Merge GST Credit Note and Debit Note PDFs
Overview
Credit notes (output reduction) and debit notes (output increase) modify your monthly GSTR-1. Auditors and CAs review them together with the original invoice trail. Merging into one document per supplier per period speeds reconciliation.
How to Use This Tool
Drop the original invoice, then debit/credit notes for the same transaction, into /merge in chronological order. Group by supplier GSTIN. Save as GSTIN_TAXPERIOD_NOTES.pdf.
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Merge PDF →Frequently Asked Questions
Why include the original invoice with the note?
Auditors verify that the note references the correct original. Putting them in one PDF means the auditor sees the full transaction history in one scroll.
Does the note's IRN persist on merge?
Yes — IRN-signed notes preserve their signature through pdf-lib merge. The QR codes remain decodable.
How do I separate B2B from B2C notes?
Two merge passes — one PDF per category. B2B notes need supplier GSTIN reconciliation; B2C notes affect your output-tax summary only. Keeping them separate aids review.