Field notes from the filing room.

Wrong place of supply, B2CS rows that should be B2CL, HSN summary mismatches — what we see most often, why the offline utility flags them, and how to catch them before submission.

2A updates dynamically, 2B freezes monthly, and your books are whatever your client typed last night. Here's the priority order we follow and why it matters for ITC claims.

The turnover threshold has dropped four times since 2020. Updated slabs, who's exempt, the IRP / IRN flow, and what happens if you miss the cutoff date.

GTAs, advocates, directors, insurance commission, import of services — the five RCM triggers that get missed most often, and the booking flow that captures them properly.

The ₹2.5L threshold is on invoice value, not taxable value — and a small price change can flip categories. The mental model we use to make sure every invoice lands in the right bucket the first time.