The ThynkTax Blog.
Filing-season briefings, plain-English readings of every CBDT circular, landmark case-law analysis, GST updates, how-to playbooks. Every post is reviewed by a named CA and citation-anchored.
Latest
IMS becomes mandatory from April 2026 - your 30-day decision rhythm
The Invoice Management System mandate changes ITC monthly. Here's how to set up your firm's 30-day IMS rhythm and the three checks that prevent ITC loss.
Form 168 Tax Passbook - how to read every section without losing your mind
A page-by-page tour of the new Form 168 - what replaced Form 26AS and AIS, the seven new schedules nobody is talking about, and the four traps that cost taxpayers refunds.
MCA V3 AOC-4 cheat sheet - every change between V2 and V3
The V2 portal sunsets June 30, 2026. Here's every operational change between V2 and V3 for AOC-4 filing, with the gotchas we've seen in the first cohort of V3 filings.
ROC late fees in 2026 - when to file late vs strike-off
A practical framework for deciding whether to file ROC forms 18 months late or to let the company strike off. Includes the four exception categories where late filing is still cheaper.
Section 393 sub-code cheatsheet - every TDS situation, mapped
A complete sub-code reference for the consolidated Section 393. Every situation you used to handle under Sections 192-206C - what the new sub-code is, what the rate is, and what the challan code looks like.
Checkmate Services: the rule on employee PF that 80% of practices still get wrong
The Supreme Court ruled in 2022 that employee PF contributions must be deposited by the labour-law due date - not the ITR due date. Three years on, we still see this disallowed in scrutiny notices.
Filing season
Weekly briefings during ITR / GSTR / ROC peaks.
Budget updates
Finance Act and Union Budget analysis.
Case law
Landmark judgments and what they change.
GST updates
GSTN circulars, rate changes, IMS.
How to
Step-by-step playbooks for common compliance workflows.
Form 168 Tax Passbook - how to read every section without losing your mind
A page-by-page tour of the new Form 168 - what replaced Form 26AS and AIS, the seven new schedules nobody is talking about, and the four traps that cost taxpayers refunds.
MCA V3 AOC-4 cheat sheet - every change between V2 and V3
The V2 portal sunsets June 30, 2026. Here's every operational change between V2 and V3 for AOC-4 filing, with the gotchas we've seen in the first cohort of V3 filings.
Section 393 sub-code cheatsheet - every TDS situation, mapped
A complete sub-code reference for the consolidated Section 393. Every situation you used to handle under Sections 192-206C - what the new sub-code is, what the rate is, and what the challan code looks like.
Opinion
Practitioner POV on policy and process.
ROC late fees in 2026 - when to file late vs strike-off
A practical framework for deciding whether to file ROC forms 18 months late or to let the company strike off. Includes the four exception categories where late filing is still cheaper.
Checkmate Services: the rule on employee PF that 80% of practices still get wrong
The Supreme Court ruled in 2022 that employee PF contributions must be deposited by the labour-law due date - not the ITR due date. Three years on, we still see this disallowed in scrutiny notices.
When to trust an AI tax agent - a CA-firm risk framework
The hardest question in modern practice management isn't how to use AI agents; it's where the line falls between agent and human. A six-factor framework for deciding what to delegate.