IMS in GST: Accept, Reject & Pending Invoices Before GSTR-2B (2026)

What is IMS (Invoice Management System)?

IMS is the recipient-side control panel for supplier-reported invoices. When a seller files GSTR-1 (or IFF), those B2B documents appear for you to act on: Accept, Reject, or Keep Pending. Your actions influence which invoices feed into GSTR-2B ITC sections and, later, what you claim in GSTR-3B.

IMS is not a substitute for books reconciliation — it is the portal workflow that freezes your posture before the static GSTR-2B snapshot is used for claim limits.

How invoices reach IMS

1. Supplier issues a tax invoice (and e-invoice IRN where mandatory).
2. Supplier reports the invoice in GSTR-1 / IFF for the period.
3. You see the document as a recipient in IMS / related inward views.
4. You Accept, Reject, or leave Pending before relying on GSTR-2B for ITC.

If the supplier never files, the invoice never becomes a clean claim path — no amount of book entries fixes a missing GSTR-1 line.

Accept vs Reject vs Pending

Action	Meaning	Typical use
Accept	You agree the invoice is yours and correct for ITC flow	Books match GSTIN, value, tax, period
Reject	You dispute the document (wrong GSTIN, not your purchase, error)	Supplier must amend / re-report
Pending	You defer decision (awaiting goods, debit note, clarification)	Temporary — do not forget open items

Columns you will also see on modern IMS screens include flags around whether ITC is to be reduced, amounts for reduction, and remarks — treat them as part of the communication trail with the supplier and your auditor.

Link to GSTR-2A, GSTR-2B and GSTR-3B

• GSTR-2A — dynamic view of what suppliers reported; useful for chase-ups.
• GSTR-2B — static monthly ITC statement used as the claim baseline (Rule 36(4) discipline).
• GSTR-3B Table 4 — where you actually take ITC (and reverse where needed).

Practice tip: accept only invoices that exist in your purchase register for the same GSTIN, tax heads, and taxable value. Reject ghosts and duplicates early.

Common IMS mistakes

• Accepting everything blindly, then finding fake GSTINs in books later.
• Leaving items Pending for months — clutter that confuses GSTR-9 year-end work.
• Ignoring rejected lines — supplier never corrects, ITC never appears in a clean 2B.
• Confusing “invoice in books” with “invoice accepted for portal ITC”.

Practice IMS on IndIaTaxSim

On IndIaTaxSim you can file GSTR-1 as one GSTIN, switch to the buyer GSTIN, see inward flow, practice accept/reject, and watch GSTR-2B / GSTR-3B linkage — risk-free. See the guided course, IMS study notes, and practice portal overview.

Disclaimer

Educational content only. Always confirm the latest GSTN portal behaviour and circulars for live filings. IndIaTaxSim is not affiliated with GSTN or the Government of India.