The TatvaBooks blog
Working notes from veteran Chartered Accountants.
Three series — practical operations for working CAs, dated commentary on GST changes, and behind-the-scenes from building TatvaBooks. Written by people who've filed thousands of returns.
Series
Closing GSTR-1 in 60 minutes — a working CA's checklist
A time-boxed checklist for filing GSTR-1 each month: eight steps in order, the place-of-supply audit, and the three places returns most often get stuck.
The TatvaBooks team
24 May 2026
GSTR-2B vs your purchase register: the 7 root causes of mismatch
Why your GSTR-2B and ITC won't reconcile, and how to find the cause fast — unfiled vendor GSTR-1, RCM, credit notes, timing gaps and Rule 86A blocked credits.
CA Anil Agarwal
20 May 2026
Sales Ledger Mismatch Detector — Protect Your GSTR-1
Posting an interstate sale to a Sales — Local ledger silently corrupts your GSTR-1 B2B split. Here's how we block the wrong CGST/SGST-vs-IGST post at entry.
The TatvaBooks team
18 May 2026
Six GST changes in FY 2026-27 every Indian SMB should know
GST 2.0 cut the slabs to 5%, 18% and 40% from 22 Sep 2025 — 12% and 28% are gone. Plus the ₹5cr e-Invoice threshold, Rule 37 ITC reversal and GSTR-9 limits.
The TatvaBooks team
12 May 2026
e-Invoice at ₹5 crore — two years on, what's actually working
The ₹5-crore e-Invoice threshold has been live since August 2023. Ground notes on IRN reliability, the 30-day reporting limit, B2C confusion and credit notes.
CA Anil Agarwal
8 May 2026
The beta
Books anyone can keep. Books your CA can trust.
TatvaBooks is in private beta with Indian CA firms and SMBs. Request access — a CA on our team onboards you within 24 hours.