Your accounting team just finished reconciling last month’s invoices, but when you log into the GST portal to file GSTR-3B, you find discrepancies between your books and the GSTR-2B data. You’ve got unrecognized credit notes, pending invoices causing ITC mismatches, and no clear way to understand which invoices are actually eligible for credit claims.

Sound familiar? You’re not alone. Since the GST system introduced the Invoice Management System (IMS) dashboard, thousands of businesses struggle with the new reconciliation workflow. The good news? The IMS dashboard actually simplifies this process—once you understand how to use it correctly.

The IMS dashboard is now a mandatory step before filing GSTR-3B. It streamlines the reconciliation between your books of accounts and GSTR-2B data, ensuring your GST compliance is accurate and avoids costly tax notices. This guide walks you through the complete IMS workflow, from invoice categorization to final tax liability submission.

Understanding the IMS Dashboard: Why It Matters for GSTR-3B Filing

The GST portal’s Invoice Management System is a reconciliation tool designed to match your GSTR-1 data (sales) with incoming GSTR-2B data (purchases). Before this system existed, businesses filed GSTR-3B based on whatever data was in their books—whether it matched GSTR-2B or not. This created widespread discrepancies and triggered tax notices.

The IMS dashboard forces reconciliation. It shows you exactly which invoices from your suppliers match their GSTR-1 filings and which ones don’t. You then take explicit actions—Accept, Reject, or Defer—for each invoice. These actions directly impact your ITC eligibility and final GSTR-3B filing.

Why is this critical? The GST authority now has real-time visibility into your invoice decisions. If you claim ITC on an invoice your supplier never reported in GSTR-1, the mismatch is flagged immediately. Taking correct IMS actions prevents these discrepancies before they become audit issues.

For businesses with significant purchase volumes, the IMS dashboard can be overwhelming. But understanding the logic behind each action—and the impact on your ITC claims—transforms it from a compliance burden into a strategic tool.

Phase 1: Taking Actionable Steps in the IMS Dashboard

The first phase of GSTR-3B filing is all about reviewing and categorizing invoices in the IMS dashboard. This step determines which invoices flow into your GSTR-2B data and which ones get excluded or deferred. It’s not just a checkbox exercise—it’s a critical decision-making phase.

Understanding the Three Invoice Actions: Accept, Reject, and Pending

When you open the IMS dashboard, you’ll see a list of invoices received from your suppliers. For each invoice, you have three action choices: Accept, Reject, or Pending. Each action has specific implications.

Accept: You’re confirming this invoice is legitimate, and you’ll claim ITC against it. The invoice flows into your GSTR-2B data and becomes eligible for credit claims. Use this for invoices where goods or services have been received and the supplier has reported the transaction in their GSTR-1.

Reject: You’re explicitly excluding this invoice from your ITC claims. This is appropriate for invoices where goods haven’t been received, the invoice contains errors, or your supplier didn’t report the sale in GSTR-1. Rejected invoices don’t appear in your GSTR-2B and don’t block your ITC.

Pending: You’re deferring the decision on this invoice to future months. Use this status for invoices where goods or services haven’t yet been received. The invoice won’t affect current month ITC, but you can revisit the decision in subsequent months. This is valuable when you’re waiting for goods delivery or service completion—you can claim ITC in the month of actual receipt rather than invoice receipt.

The strategic use of “Pending” status is often overlooked. Many businesses mark invoices as Pending when goods are in transit, then accept them in the following month when delivery is confirmed. This ensures ITC claims align with actual receipt dates, preventing discrepancies in stock reconciliation.

Verifying Credit Notes: Prevent Unauthorized ITC Reductions

One of the most common audit issues is unrecognized credit notes. A supplier issues a credit note against your original invoice (due to returns, adjustments, or billing errors), but they report it in GSTR-1 and it flows into your GSTR-2B. If you don’t actively match this credit note to the original invoice, you might claim full ITC on both the original invoice and fail to recognize the credit note reduction.

The IMS dashboard flags credit notes separately. You must match each credit note to its corresponding original invoice. This verification step prevents unintended ITC overstatement and demonstrates to tax authorities that you’re maintaining proper records.

Credit note verification requires careful invoice tracking. Maintain a supplier invoice log that includes original invoice numbers and date. When credit notes arrive, cross-reference them immediately. Delay in matching credit notes creates audit trails and potential penalties.

Use the “Pending” Status Wisely for Goods-in-Transit Scenarios

The Pending status is particularly useful for businesses dealing with goods in transit. If you’ve received an invoice but the goods haven’t arrived yet, mark it Pending. This keeps your books clean—ITC isn’t claimed until actual receipt. When goods arrive, revisit the invoice and change status to Accepted.

This approach prevents a common compliance issue: claiming ITC on invoices before confirming physical receipt of goods. Tax authorities increasingly cross-check ITC claims with goods receipt notes and stock ledgers. Misalignment between ITC claims and actual stock received triggers notices.

Phase 2: Finalizing the GSTR-3B Return with Auto-Populated Data

Once you’ve completed all invoice actions in the IMS dashboard, Phase 2 begins. The GSTR-3B return is now automatically populated with data from two sources: your GSTR-1 filing (sales data) and IMS-validated GSTR-2B data (validated purchase data). Your job now is to review, verify, and finalize before submission.

Auto-Populated Tables 3.1 and 4: The Data You Didn’t Have to Manually Enter

Table 3.1 in GSTR-3B shows your total output tax (GST you’ve collected from customers). This comes directly from your GSTR-1 filing and requires no manual data entry. Similarly, Table 4 shows your input tax (GST paid on purchases). This is pulled from IMS-validated GSTR-2B data—only invoices you Accepted in the IMS dashboard flow here.

This auto-population eliminates a major source of errors. Previously, businesses manually entered these figures and made calculation mistakes. Now, the data flows automatically from validated sources. Your GSTR-1 and IMS dashboard actions directly feed into GSTR-3B tables, creating an integrated compliance workflow.

However, auto-population doesn’t mean you can skip review. Verify that:

• Your GSTR-1 sales data is accurately reflected in Table 3.1
• All invoices you Accepted in IMS appear in your GSTR-2B data
• No invoices you Rejected appear (if they do, this indicates IMS action wasn’t properly processed)
• The total ITC amount matches your expected tax credit from purchases

Mandatory Tax Liability Breakup: Segregate IGST, CGST, and SGST

A critical new requirement in GSTR-3B filing is the mandatory tax liability breakup. Before submission, you must save a period-wise tax liability breakup—a detailed breakdown of your tax liability by tax type (IGST, CGST, SGST) for the filing period.

This breakup ensures you’ve properly categorized all transactions:

• IGST (Integrated GST): Applied to inter-state supplies
• CGST (Central GST): Applied to intra-state supplies to the central government
• SGST (State GST): Applied to intra-state supplies to the state government

Why is this mandatory now? Tax authorities use this data to verify that your output tax collection aligns with the place of supply for each transaction. Misclassification of supplies as IGST when they should be CGST (or vice versa) creates discrepancies and triggers queries.

Most accounting software can auto-generate this breakup from your invoice data. If yours doesn’t, maintain a manual ledger segregating sales by tax type and geographic location. This document becomes critical during GST audits.

Flexible ITC Set-Off: Strategic Payment of Tax Liability

After calculating your tax liability, you need to manage how you’ll pay or adjust it. The IMS-integrated GSTR-3B filing introduces flexible ITC set-off options. You now have multiple strategies:

Fully Offset IGST First: Apply your entire IGST input credit against IGST output tax first. This is the straightforward approach—use IGST credit to reduce IGST liability. Any excess IGST can be carried forward to the next period.

Manually Adjust CGST/SGST: After setting IGST, you can manually adjust remaining ITC against CGST and SGST output liability in different proportions. This flexibility allows strategic tax management, particularly for businesses with large IGST input (inter-state purchases) but primarily intra-state sales.

Before Generating Challans: The final step before paying is setting your ITC adjustments. You must finalize these decisions before generating e-challan for payment. Once the challan is generated, adjustments can’t be changed for that period—you’d need to file an amended GSTR-3B.

This flexibility benefits businesses managing complex supply chains across states. By strategically deciding which tax types to adjust first, you can optimize cash flow while maintaining compliance.

Common IMS Dashboard Errors and How to Avoid Them

Understanding IMS actions is one thing; executing them correctly across hundreds or thousands of invoices is another. Here are the most frequent errors and prevention strategies.

Accepting All Invoices Without Verification: The IMS dashboard shows all invoices your suppliers reported. Accepting every invoice without checking if goods were actually received is the quickest path to audit issues. Maintain physical receipt documentation (goods receipt notes, delivery challans, email confirmations) for every accepted invoice.

Deferring Too Many Invoices: While Pending status is useful for goods-in-transit, over-using it creates a backlog of unresolved invoices. Establish a review schedule—perhaps weekly—to revisit Pending invoices and convert them to Accepted or Rejected. Indefinite deferral prevents you from accurately calculating tax liability.

Missing Credit Note Matching: This is an audit red flag. If a supplier issues a credit note and you don’t explicitly match it to the original invoice in IMS, you’ll claim full ITC on the original plus fail to recognize the credit reduction. Credit note reconciliation must happen immediately upon receipt.

Misclassifying Supply Location: When segregating ITC by tax type (IGST/CGST/SGST), misclassifying an inter-state purchase as intra-state creates discrepancies. Always verify the supplier’s place of business before classifying their invoices. This impacts both your ITC calculation and the supplier’s own GSTR-1 filing.

Filing Without Finalizing the Tax Liability Breakup: Rushing to submit GSTR-3B without generating the mandatory tax liability breakup is not permitted. The system won’t allow submission. Always allocate 15-20 minutes to review and finalize the breakup before clicking submit.

How TaxMSME Manages IMS Dashboard Reconciliation for Your Business

Navigating the IMS dashboard reconciliation process requires not just technical knowledge of GST rules, but also diligent invoice tracking and decision-making. For businesses with high invoice volumes, this can consume significant time and resources.

At TaxMSME, our GST compliance team handles complete IMS dashboard management as part of your GSTR-3B filing process. We extract your invoice data from your accounting system, cross-reference supplier GSTR-1 filings against your received invoices, and take appropriate IMS actions (Accept, Reject, or Pending) based on your physical documentation.

Our process ensures:

• Every invoice is matched against supplier GSTR-1 data
• Credit notes are properly reconciled and linked to original invoices
• Goods-in-transit invoices are tracked and managed through Pending status
• Tax liability is correctly segregated by IGST/CGST/SGST for each supply
• All IMS actions are documented and audit-ready

Our expert chartered accountants also identify discrepancies between your books and GSTR-2B data—potential audit risks. We work with you to resolve these before GSTR-3B submission, preventing tax notices and penalties.

For businesses expanding across states or handling complex supply chains, our tax planning services leverage IMS dashboard data to optimize your GST position. We analyze your ITC patterns, identify adjustment opportunities, and structure your ITC set-off strategy to minimize tax liability while maintaining full compliance.

Your dedicated relationship manager coordinates this entire process. They handle invoicing reconciliation, resolve IMS discrepancies, and ensure GSTR-3B filing is completed before the deadline—typically the 20th of the following month for regular taxpayers.

GSTR-3B Filing with IMS Dashboard: Frequently Asked Questions

What’s the difference between GSTR-2B and the invoices shown in the IMS dashboard?

GSTR-2B is auto-generated from all GSTR-1 filings your suppliers submitted. It shows every invoice they reported selling to you. The IMS dashboard shows the same data, but allows you to take actions—Accept, Reject, or Pending—on each invoice. Only invoices you Accept flow through to your final GSTR-2B for ITC claiming. Rejected and Pending invoices are excluded or deferred. Your actions in IMS directly shape what appears in your GSTR-3B filing.

Can I change my IMS actions after filing GSTR-3B?

You can amend your IMS actions, but this creates a cascading amendment in GSTR-3B as well. If you initially Accepted an invoice but later Reject it, your ITC claim reduces—you’d need to file an amended GSTR-3B. This process is permitted but should be minimized. Get your IMS actions right the first time to avoid amendment complexities and potential audit scrutiny.

Why is the tax liability breakup mandatory in GSTR-3B filing?

The breakup segregates your tax liability by type (IGST, CGST, SGST), allowing tax authorities to verify your tax classification against your supply locations and GSTR-1 data. This ensures you’re correctly categorizing inter-state supplies as IGST and intra-state supplies as CGST/SGST. Misclassification is a common audit trigger.

What happens if a supplier’s GSTR-1 shows an invoice, but I didn’t receive goods?

This is a discrepancy. Mark the invoice as Rejected in the IMS dashboard. This prevents ITC claim and signals to tax authorities that you didn’t recognize the transaction. Separately, contact your supplier to investigate why they reported an invoice you didn’t receive. This could indicate invoice fraud or data entry error on their part.

How does the Pending status help with ITC claims?

Pending defers your decision on an invoice to future months. If goods are in transit, mark Pending instead of Accepting. When goods arrive, revisit the invoice and Accept it. This ensures ITC is claimed in the month matching your actual goods receipt date, preventing discrepancies with your stock ledger.

Can I set ITC set-off strategy flexibly, or must I fully offset IGST first?

You have flexibility. The default is full IGST offset, but you can manually adjust CGST/SGST proportions based on your business needs. This flexibility is valuable if you have large inter-state purchases (IGST) but limited inter-state sales. However, any changes must be finalized before generating tax payment challans.

What’s the deadline for GSTR-3B filing with IMS actions completed?

For regular taxpayers, GSTR-3B deadline is the 20th of the following month. All IMS dashboard actions must be completed well before this date to allow time for GSTR-3B preparation and verification. We recommend completing IMS actions by the 15th to provide a 5-day buffer for any discrepancies requiring resolution.

Mastering GSTR-3B Filing: Your Action Plan

The IMS dashboard transforms GSTR-3B filing from a mechanical data-entry task into a strategic reconciliation process. Taking correct IMS actions—accepting legitimate invoices, rejecting discrepancies, and deferring goods-in-transit—directly impacts your ITC eligibility and tax liability.

Your action plan for the current month:

1. Log into the IMS Dashboard: Access your GST portal and review all pending invoices from the previous month.

2. Cross-Reference Physical Documentation: Match each invoice against goods receipt notes, delivery challans, and supplier confirmations.

3. Take Deliberate Actions: Accept invoices with confirmed receipt, Reject discrepancies, and defer goods-in-transit using Pending status.

4. Verify Credit Notes: Reconcile any credit notes against original invoices immediately upon receipt.

5. Review Auto-Populated Tables: Verify GSTR-3B Tables 3.1 and 4 reflect your IMS actions correctly.

6. Finalize Tax Liability Breakup: Generate the mandatory breakup segregating IGST/CGST/SGST before final submission.

7. Review ITC Set-Off Strategy: Confirm your IGST offset and CGST/SGST adjustments align with your tax planning approach.

If managing this monthly process consumes significant time or creates compliance anxiety, partnering with a GST compliance expert ensures you never miss a deadline, never make discrepancies, and always optimize your tax position. TaxMSME’s team handles this end-to-end, giving you peace of mind that your GSTR-3B filing is accurate and audit-ready every single month.

Don’t let IMS dashboard complexity cost you time and compliance accuracy. Schedule a free consultation with our GST experts today. We’ll review your current GSTR-3B process, identify reconciliation gaps, and set up a streamlined workflow that keeps you compliant while minimizing your administrative burden.

Contact TaxMSME for expert GSTR-3B filing and IMS dashboard management.