How to Reconcile GSTR-3B with the IMS Portal: A Step-by-Step Process
The Invoice Management System (IMS) is a new feature on the GST Portal aimed at addressing mismatches between supplier invoices and recipient returns, a common challenge in claiming Input Tax Credit (ITC). IMS allows recipient taxpayers to actively manage invoices by accepting, rejecting, or marking them as pending based on their reconciliation with records.
This system matches supplier-uploaded invoices in GSTR-1 with recipient records, ensuring accuracy and reducing errors in ITC claims. By streamlining invoice reconciliation, IMS enhances compliance, simplifies ITC availing, and fosters collaboration between taxpayers, paving the way for a more efficient GST framework.
Steps to verify GSTR 3B With IMS Portal
Step 1: Log In to the GST Portal
Go to the official GST website- https://www.gst.gov.in/ and log in with your Username and Password.

Step 2: Go to Services – Return – Invoice Management System (IMS) Dashboard

Step 3: Open the IMS Dashboard
After logging in, find the Invoice Management System (IMS) option on the portal.
- The dashboard will show all invoices uploaded by your suppliers.
- These invoices will be marked as Accepted, Rejected, or Pending, based on actions you’ve taken.

Step 4: Check Supplier Invoices
Carefully review the invoices uploaded by your suppliers. Pay attention to:
- Supplier GSTIN (their GST number).
- Invoice details (number, date, tax amount, and type).
- Confirm that everything matches your purchase records.

Step 5: Take Action on Invoices
For each invoice, you need to choose one of three actions:
- Accept: If the invoice details are correct and you want to claim ITC for it.
- Reject: If there are errors or mismatches in the invoice.
- Keep Pending: If you’re unsure about the invoice or waiting for confirmation.
Important: If you don’t take any action, the system will automatically treat the invoice as Deemed Accepted.

Step 6: Recompute GSTR-2B
Once you’ve completed the actions on your invoices, recompute your GSTR-2B (the statement of available ITC).
- This ensures your ITC details are updated with the actions you’ve taken on IMS.
- Do this before filing GSTR-3B.
Step 7: Match GSTR-2B with GSTR-3B
Now, compare the updated GSTR-2B with your GSTR-3B draft:
- Ensure the ITC you’re claiming in GSTR-3B matches the invoices you’ve accepted in IMS.
- Exclude invoices you rejected or kept pending.
Step 8: File GSTR-3B
After verifying everything:
- Submit your GSTR-3B with the correct ITC details.
- Double-check the summary to avoid mistakes.
What If Something Doesn’t Match?
If you spot a mistake or mismatch:
- Go back to the IMS portal, correct the action (e.g., change “Rejected” to “Accepted”), and recompute your GSTR-2B.
- Coordinate with your supplier if they need to amend the invoice.
Keep Records for Future Use
Save your records for future audits, including:
- Actions taken on invoices.
- GSTR-2B and GSTR-3B reconciliations.
- Any communication with suppliers.
Conclusion
The process of verifying and reconciling Input Tax Credit (ITC) claims through the Invoice Management System (IMS) is an essential step for ensuring compliance with GST regulations while filing GSTR-3B. By integrating IMS with the GST portal, businesses can streamline the invoice management process, enhance accuracy, and minimize discrepancies that might lead to errors in ITC claims or GST returns.
Here are the key elements to emphasize:
- Accurate Verification of Invoices: By logging into the GST portal and reviewing the invoices uploaded by suppliers, businesses have the opportunity to verify that the details such as supplier GSTIN, invoice number, date, tax amounts, and tax type are correct. This step is critical as incorrect invoices could lead to incorrect ITC claims, which might later be flagged by authorities during audits.
- Timely Action on Supplier Invoices: Once invoices are reviewed, businesses must take the appropriate action – Accept, Reject, or Keep Pending. This ensures that only accurate and verified invoices are considered for ITC claims. If no action is taken, the system automatically considers the invoice as “Deemed Accepted,” which might lead to discrepancies or missed opportunities for rejecting invalid invoices. Therefore, timely and accurate actions on invoices are essential for accurate reporting.
- Recomputing GSTR-2B: After taking action on invoices, businesses need to recompute their GSTR-2B to ensure that the ITC reflected is up-to-date. This step ensures that only those invoices marked as “Accepted” contribute to the ITC claim, and invoices marked as “Rejected” or “Pending” are excluded. This updated GSTR-2B serves as the foundation for the GSTR-3B filing, ensuring accurate tax calculations.
- Matching GSTR-2B with GSTR-3B: The next crucial step is to compare the updated GSTR-2B with the draft of GSTR-3B before submission. Ensuring that the ITC claimed in GSTR-3B aligns with the accepted invoices in GSTR-2B helps avoid discrepancies in the return, which could lead to penalties or audits. It is also important to ensure that only valid, accepted invoices are included in the ITC claim, while rejected or pending invoices are excluded.
- Ensuring Compliance and Avoiding Disputes: The process of matching and verifying GSTR-2B with GSTR-3B helps to ensure that businesses remain compliant with the GST laws. Any mismatches or discrepancies in claims can result in unnecessary notices from tax authorities, which can complicate the filing process or lead to penalties. By performing this reconciliation regularly, businesses reduce the risk of such issues.
- Maintaining Comprehensive Records: After completing the reconciliation and filing GSTR-3B, it is essential to keep detailed records of all actions taken on invoices, the reconciliation of GSTR-2B with GSTR-3B, and any communication with suppliers. These records are crucial for future audits or inquiries by tax authorities. Proper documentation not only helps in resolving any potential disputes but also ensures that businesses can demonstrate their compliance with the tax laws.
- Continuous Monitoring and Collaboration with Suppliers: In case discrepancies arise, businesses should actively communicate with their suppliers to rectify any errors in the invoices. This collaboration helps maintain the accuracy of the information submitted in GST returns and reduces the risk of penalties due to inaccurate claims. Timely corrections, either by changing the status of an invoice in IMS or asking suppliers to amend erroneous invoices, ensure that ITC claims are valid and compliant.
By following these steps and utilizing the IMS portal effectively, businesses can optimize their GST compliance process, ensure accurate ITC claims, and avoid common pitfalls such as incorrect claims, mismatched returns, or potential penalties. Staying organized, proactive, and attentive to the details throughout the GST return cycle will help businesses streamline their operations and maintain smooth interactions with tax authorities.
