Major changes in GST Invoice Management System (IMS) from October 2025 tax period

The Goods and Services Tax Network (GSTN) recently announced a new feature in the Invoice Management System (IMS) on the GST portal. This allows taxpayers to mark credit notes as “Pending” for one tax period.

In an advisory issued on October 17, 2025, GSTN also mentioned that the IMS functionality has been improved giving a flexibility to the taxpayers to modify their ITC reversal upon accepting these credit notes, which helps to settle numerous business disputes.

An Tax expert said to ET Wealth Online that a new table 6A1 was introduced in GSTR-9.

He says:

  • A new section, Table 6A1, has been introduced in GSTR-9. It allows taxpayers to present a more accurate and reconciled view of their input tax credit (ITC) claims, assisting both taxpayers and officers during desk reviews. This enhancement minimizes the chances of scrutiny or notices and helps reduce litigation costs in terms of both time and money.
  • To fully benefit, taxpayers must ensure their books of accounts and working papers are well-maintained. The department is expected to compare the figures reported in Table 12 (Reversal of ITC) and Table 13 (Availing ITC) from the previous year’s return with those in the current year’s Table 6A1 to ensure consistency and accuracy. Reclaimed ITC should not be included here.

Check out the details below to learn more about the updates made in IMS.

New Changes in Invoice Management System (IMS)

According to the advisory, here are some frequently asked questions about the changes in the IMS system of the GST portal.

1. For which documents, a pending option has been provided now which was not allowed earlier?

Pending option has also been provided for the following documents:

  • Credit notes, or upward amendment of Credit note,
  • Downward amendment of CN where original CN was rejected,
  • Downward amendment of Invoice / DN only where original Invoice already accepted and 3B has been filed,
  • ECO-Document downward amendment only where original accepted, and 3B has been filed.

2. What are the new changes being introduced in IMS?

The following new changes have been introduced in the IMS functionality:

  1. Allowing pending action for the records mentioned above in Question-1
  2. Option to declare the ‘Amount of ITC to be reduced’ in IMS by the recipient taxpayers for the records for which the ITC was already reversed or not availed by the taxpayers such as CNs, upward amendment of CN or downward amendment of Invoice/DN.
  3. Option to provide a remark by the recipient taxpayers at the time of taking reject or pending action on the records.

4. Are these changes intended to be applied prospectively or retrospectively?

The new changes shall be implemented prospectively and the above mentioned options will be available to the taxpayers from October tax period onwards. Please refer to the examples mentioned below for better understanding.

Examples:

  1. CN dated 15 Sept 2025, reported in GSTR-1 of Sept 2025 filed on 11 Oct 2025 → Appears in IMS but without Pending Option/new facility.
  2. CN dated 15 Oct 2025, reported in GSTR-1 of Oct 2025 on 15th Oct 2025 filed on 11 Nov 2025 → Appears in IMS with Pending Option/new facility at the time of record added in the GSTR 1
  3. CN dated 15 Mar 2025, reported in GSTR-1 of Oct 2025 filed on 11 Nov 2025 → Appears in IMS with Pending Option/new facility, since GSTR-2B period is Oct 2025.
  4. CN dated 20 Sept 2025, reported in GSTR-1A of Sept 2025 filed on 14 Oct 2025 → Appears in IMS with Pending Option/new facility at the time of adding the record, as its GSTR-2B period is Oct 2025.

5. Till what date can Credit Notes and other specified records be kept pending?

  1. For monthly taxpayers(recipient) – 1 tax periods (month)
  2. For Quarterly taxpayer(recipient) – 1 tax period (One quarter)

These records are allowed to keep pending as per formula below –

Due date of GSTR-3B filing of [applicable GSTR-2B period (as per date of filing of source return) + Specified period (i.e. 1 tax period)].

Example –

If recipient is monthly

GSTR-1 is filed by the supplier on 10 November 2025 in GSTR 1 or IFF. So CNs reported in this GSTR-1 can be kept as pending on IMS dashboard by recipient taxpayer till 1 month as explained below:

  • Applicable GSTR 2B period – October 2025
  • Specified period – 1 Tax period i.e. one Month
  • Next tax period following the GSTR 2B period is October’25 + 1 Months = November’25
  • Therefore, last date to keep the record as pending i.e. due date of GSTR 3B for November’25 = 20th December 2025

If the recipient is quarterly

GSTR-1Q for Oct -December quarter is filed by the supplier on 10th January 2026. So CNs reported in this GSTR-1 can be kept as pending on IMS dashboard by recipient taxpayer who is opted for QRMP till 1 tax period as explained below:

  • Applicable GSTR-2B period – Oct-Dec 2025
  • Specified period – one Tax period i.e. one Quarter
  • The next tax period following the GSTR 2B period is Oct-Dec 2025 + 1 Quarter = Jan-March 2026 Therefore, last date to keep the record as pending i.e. due date of GSTR 3B for Jan-March 2026 = 22nd/24th April 2026.
  • Rs 1.5 crore tax refund withheld by Income Tax Dept due to mismatch between ITR and Form 26AS; taxpayer files case, wins in High Court

5. What will happen after the expiry of allowed period for keeping the record as pending

Pending action will be disabled after a specified period. Hence, the recipient has to accept or reject that record after the expiry of the specified time period. If no action is taken then the system will consider such a record as deemed accepted.

6. Will the taxpayer get any option to declare the amount of ITC which need to be reversed?

Currently the system reverses the entire ITC amount in GSTR-2B of a taxpayer on acceptance of Credit note and similar records even if the taxpayer has not availed the ITC of the corresponding invoice or has reversed certain amount (partial reversal) in GSTR-3B as there are no option to declare the value of ITC need to be reversed on acceptance of such CN.

Now as per the new changes introduced in the system from October 2025 tax period the recipient taxpayer shall have an option to declare the amount of ITC that needs to be reversed for a given record. On acceptance of the such a record the below question will appear on screen.

“Whether ITC needs to be reduced for the selected record(s)?”

This question will be asked to the recipient taxpayer at the time of accepting the above-mentioned records so that the recipient can reverse the correct ITC amount which was actually availed earlier by him.

The taxpayer will be given 2 options (i) Yes or (ii) No If recipient selects the option NO, that means he hadn’t availed any ITC for corresponding invoice hence ITC reversal is not required.

Therefore, no ITC reduction will happen for the selected record despite acceptance of such record.

If the recipient selects Yes, it means full reversal or partial reversal is required. In case partial reversal is required, once the recipient selects Yes, then the recipient will get an option to declare the amount of ITC which needs to be reversed for the selected record.

This declaration of value is OPTIONAL for taxpayers and the value should be provided by the taxpayer in cases of partial reversal is required. In cases where the recipient is required to reverse full ITC then the recipient taxpayer will proceed by selecting the option YES and without declaring any value. In this case, the recipient’s ITC will be reduced based on the full values of such records.

Based on the above, ITC will be calculated in GSTR-2B of the recipient taxpayer and will be populated in GSTR-3B.

7. Can I save the remark at the time of taking Reject/ Pending action?

Yes, at the time of taking reject and pending action on any of the record, taxpayer will get the option to save the remark. In case of partial and no reversal remarks will be mandatory.

Source #TOI

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