The IMS (Invoice Management System) is a specialized feature in the GST portal (www.gst.gov.in) that enables registered taxpayers to review, verify, and manage invoices uploaded by suppliers. It forms the base for reconciling GSTR-2B (Input Tax Credit statement) and GSTR-3B returns.
From October 2025, the system became more interactive, requiring mandatory taxpayer actions.

Activities You Can Do on the IMS Portal

1. View All Invoices and Notes

• View all B2B invoices, debit notes, and credit notes raised by suppliers.
• Filter records by month, counterparty, or status (Accepted, Rejected, Pending).
• Check the tax breakup, GSTIN of supplier, invoice number, and uploaded date.

2. Accept Invoices

• Mark invoices as “Accepted” when they correctly match your purchase records.
• Once accepted, they are automatically considered for Input Tax Credit (ITC) in GSTR-2B.
• These invoices also appear in GSTR-3B Table 4A for ITC utilization.

3. Reject Invoices

• Reject invoices that do not correlate with your records — for example, wrong GSTIN or inflated values.
• A rejected record notifies the supplier automatically, prompting correction via GSTR-1A amendment.
• These invoices are excluded from ITC computation.

4. Mark Invoices or Notes as Pending

• Newly introduced feature (October 2025).
• Allows you to temporarily hold action on certain records:
  • Credit notes under verification.
  • Amended invoices.
  • E-commerce operator documents with discrepancies.
• Valid for 1 month (monthly filers) or 1 quarter (quarterly filers).

5. Partial ITC Reversal (for Credit Notes)

• A new field lets you specify how much ITC to reverse on each credit note.
• Example: If ₹18,000 ITC was available but only ₹9,000 used, you can reverse ₹9,000 only.
• Promotes more accurate accounting and elimination of double reversal errors.

6. Add Remarks or Notes

• While accepting, rejecting, or pending any record, you can add remarks.
• Remarks are visible to both buyer and supplier, helping in dispute resolution and transparency.

7. Generate or Regenerate GSTR-2B

• After taking actions, you can regenerate GSTR-2B to reflect updated data.
• GSTR-2B is still auto-generated on the 14th of each month, but manual regeneration allows updates if IMS actions occur later.

8. Track and Download Reports

• Download your invoice list in Excel or JSON format.
• View action summary (Accepted/Rejected/Pending totals) for audit documentation.

Advantages (Pros) of Using IMS

Disadvantages (Cons) and Limitations

Best Practices for Efficient IMS Usage

1. Review the IMS dashboard weekly instead of waiting till month-end.
2. Always use the Remark field to communicate invoice discrepancies to suppliers.
3. Regenerate GSTR-2B after taking all actions before filing GSTR-3B.
4. Maintain a parallel Excel log for high-value invoices for double verification.
5. Cross-check pending records before the auto-expiry period.

Where to Read Official Guidance

• GST Portal (official updates): https://www.gst.gov.in
• CBIC Advisory on IMS: https://cbic-gst.gov.in
• ClearTax IMS FAQs: https://cleartax.in/s/faqs-on-invoice-management-system-ims-gst

In essence, the IMS system (effective October 2025) offers Indian businesses a structured, transparent way to manage invoices and credit notes, fostering accurate Input Tax Credit reconciliation. However, taxpayers must adapt to its manual action framework to fully leverage its compliance benefits.