Step 01
24-hour cancellation window
Within 24 hours of IRN generation, cancellation is allowed via the GSP. Cancellation reason captured. Original invoice marked cancelled in the books.
GST E-Invoicing Software | Cancel & Amend E-Invoice
Cancel within 24 hours. Amend after, via credit and debit notes.
IRN cancellation allowed only within the 24-hour GSTN window (the cut-off is enforced). After 24 hours, corrections happen via credit and debit notes (CDNR), with full traceability to the original IRN. Both flows inline, no portal switching.
How it works
Cancel or amend, by the rule.
Step 02
After 24 hours, amend via CDNR
Beyond the 24-hour window, the original IRN is preserved. Corrections happen via credit notes (issuer-side) or debit notes, with full reference to the original IRN.
Step 03
CDNR IRN generation
Credit and debit notes get their own IRN with the original invoice referenced. The CDNR IRN flows to GSTR-1 Section 9B automatically.
Step 04
Audit trail across the chain
Original invoice, cancellation, credit notes and debit notes all linked. Auditor sees the full chain in one view.
What the system does
Capability, input, output.
| Capability | Input | Output |
|---|---|---|
| 24-hour cut-off enforcement | Cancel request + IRN timestamp | Allowed or blocked per the GSTN rule |
| Cancellation flow | Cancellation reason + IRN | GSP cancellation + books update |
| CDNR generation | Original invoice + correction | CDNR with its own IRN |
| CDNR IRN linkage | Original IRN reference | GSTR-1 Section 9B auto-populated |
| Audit trail | Original + cancel + CDNR chain | Single chain view |
-
24-hour cut-off enforcement
- Input
- Cancel request + IRN timestamp
- Output
- Allowed or blocked per the GSTN rule
-
Cancellation flow
- Input
- Cancellation reason + IRN
- Output
- GSP cancellation + books update
-
CDNR generation
- Input
- Original invoice + correction
- Output
- CDNR with its own IRN
-
CDNR IRN linkage
- Input
- Original IRN reference
- Output
- GSTR-1 Section 9B auto-populated
-
Audit trail
- Input
- Original + cancel + CDNR chain
- Output
- Single chain view
Compliance + integrations
Cancellation by the rule. Amendment by the section.
GSTN allows IRN cancellation only within 24 hours. After that, Section 34 of the CGST Act governs corrections via credit and debit notes. The system enforces both rules.
Regulations we work within
-
GSTN cancellation rule
IRN cancellation allowed only within 24 hours of generation.
-
Section 34, CGST Act
Credit and debit notes for post-24-hour corrections.
-
Rule 53, CGST Rules
CDNR fields and IRN reference required.
Connects to
- NIC IRP Cancellation + CDNR IRN
- Authorised GSP Relay for cancellation and CDNR
Cancel & Amend E-Invoice FAQ
What buyers ask.
What if we discover an error after 25 hours?
IRN cancellation is no longer allowed (GSTN rule). The original invoice is preserved as filed. Corrections happen via credit notes (where buyer is over-charged) or debit notes (where buyer is under-charged) with the original IRN referenced. The CDNR IRN gets its own reference.
EWB cancellation. Same 24-hour window?
EWB cancellation is allowed within 24 hours of generation, before the goods are dispatched. After dispatch, the EWB cannot be cancelled; it can only expire on its own validity.
Bulk cancellation supported?
Yes. Bulk cancellation of multiple IRNs is supported within the 24-hour window per IRN. Each cancellation is captured individually with reason.
More in GST E-Invoicing Software
Related features
Test the cancel and amend flow on a sample IRN.
Connect one GSTIN, free. Generate a test IRN; cancel within 24 hours; or generate a credit note after. Both flows are one screen.