C.K. Gupta
The complete GST collection for businesses and professionals — rates, registration, returns, ITC, e-invoicing and notices. New to GST? Start with the Start Here guides. Returning filers can jump straight to returns and ITC. Verify figures against CBIC notifications linked in each guide.
Start Here
What is GST? CGST, SGST and IGST Explained with Examples (2026)
The absolute beginner’s guide: what GST is, how CGST, SGST and IGST split between same-state and inter-state sales, with examples.
GST Rates in 2026: 5%, 18% and 40% Slabs After GST 2.0
GST 2.0 simplified rates to 5% and 18% plus a 40% demerit slab. See what got cheaper and what moved where.
GST Registration: Threshold Limits, Documents and Process (2026)
Who must register, the Rs 20/40 lakh thresholds, documents needed and the step-by-step online application.
GSTR-1 Filing Guide: Due Dates, Tables and Late Filing Rules (2026)
How to file GSTR-1: due dates, table-wise breakup, and what late filing costs in fees and interest.
GSTR-3B Filing Guide: Sections, Due Dates and Late Fee (2026)
The monthly summary return explained section by section, with due dates and late-fee rules.
ITC Reconciliation With GSTR-2B and IMS: Step-by-Step Guide 2026
Match your purchase ITC with GSTR-2B and the new Invoice Management System so no credit slips through.
Basics & Rates
What is GST And Why Was It Introduced in India?
The story behind GST: why India replaced 17 indirect taxes with one nation, one tax in 2017.
HSN Code: Meaning, Digits Explained and How to Find Yours (2026)
HSN codes decoded: how many digits your turnover needs and how to find the right code for your goods.
GST Rates & HSN Codes: Everything You Need to Know for 2026
The complete rate-and-HSN reference: which slab applies to your product or service this year.
Registration
GST Registration for E-commerce Sellers: Threshold Limit & Documents Required
Selling on Amazon or Flipkart? E-commerce sellers face special GST registration rules, explained here.
How to Amend GST Registration Online & Update Your Business Information
Change address, add a business vertical or update contacts: the amendment process step by step.
Suo Moto Cancellation of GST Registration: The Complete Guide
When the department cancels your GSTIN on its own: causes, consequences and how to get it revoked.
Delhi High Court: Biometric Aadhaar Authentication for GST Registration
September 2026 order explained: what biometric Aadhaar verification means for new GST applicants.
Returns & Filing
What is GSTR-1, GSTR-2 and GSTR-3B – How to File Returns Explained
The three core returns decoded: who files which, what goes in each, and how they connect.
What Are the Different Types of GST Returns
GSTR-1, 3B, 4, 9 and more: the full map of GST returns and who files each one.
QRMP Scheme: Quarterly Return and Monthly Payment Guide (2026)
Turnover under Rs 5 crore? File quarterly under QRMP and pay tax monthly: eligibility and process.
GSTR-9 & GSTR-9C Annual Return Guide 2026: Due Date & Format
The annual return and reconciliation statement: due dates, format and who must file GSTR-9C.
GST Annual Return GSTR-9/GSTR-9C Filing Due Date & Late Fee for FY 2025-26
FY 2025-26 annual filing: last dates, late fees and a table-wise checklist.
ITC & Reconciliation
Invoice Management System (IMS) Explained: How to Reconcile ITC
The new IMS changes how buyers accept invoices: learn the accept, reject and pending workflow.
How to Fix ‘ITC Not Reflecting in GSTR-2B’ Error – Complete 2026 Guide
Credit missing in GSTR-2B? Causes and fixes, from supplier filing gaps to IMS actions.
GSTR-9 FY 2024-25: New Table 6(A1) Explained for Previous Year’s ITC
Reporting last year’s ITC in this year’s annual return: Table 6(A1) decoded.
Unknowingly Claimed Fake ITC? How to Avoid Penalties and Prosecution
Bought from a fraud supplier? How to reverse wrongly claimed ITC and stay out of trouble.
GST ITC-04 Return: The Ultimate Guide to Filing Your Job Work Return
Sending goods for job work? ITC-04 tracks them: due dates, format and filing steps.
E-Invoicing & E-Way Bills
E-Invoicing Under GST: Threshold, IRN, QR Code and 2FA Guide
E-invoicing from Rs 5 crore turnover: IRN generation, QR codes and two-factor authentication explained.
New E-Way Bill Rules 2026: Mandatory Ship-To GSTIN & Closure Facility
The 2026 e-way bill changes: ship-to GSTIN reporting and voluntary closure, step by step.
E-Way Bill Rules 2026: Limit, Validity and Exemptions Explained
When you need an e-way bill, how long it stays valid and which goods are exempt.
E-Way Bill Rules Amendment 2026 – New Thresholds: What Every Business Must Know
Threshold changes in the 2026 amendment: check whether your consignments are affected.
2-Factor Authentication in GST e-Invoice and e-Waybill: Steps & FAQs
2FA is now mandatory for e-invoice and e-way bill logins: setup steps and common questions.
ENR-03: How To Generate e-Way Bills By Unregistered Dealers
Not GST-registered but need to move goods? The ENR-03 route for unregistered dealers.
Notices & Penalties
GST Notices Explained: DRC-01, ASMT-10, REG-17 and Replies (2026)
The main GST notices decoded: what each one means and how to draft your reply.
How to Handle GST ASMT-10 Notice for Mismatch in GSTR-1 and GSTR-3B
Got an ASMT-10 for return mismatches? Reconcile, respond and close it: the full process.
Received a GST Notice (DRC 01B) for Mismatch in GSTR-2A/2B and GSTR-3B?
DRC-01B means your ITC does not match your filings: how to respond correctly.
Understanding Section 74 of the CGST Act, 2017: A Guide to Fraud Cases
Section 74 covers fraud and wilful misstatement: penalties, timelines and defences.
GSTR 3A Notice: Understanding Notices, Actions, and Implications
Missed filing a return? The GSTR-3A notice is the first nudge: what to do next.
GST Litigation Shake-up: State Benches of GSTAT – Filing Your First Appeal
GSTAT benches are live: how to file your first GST appeal, step by step.
GST Tools
GST Calculator
Add or remove GST from any price instantly, with CGST/SGST/IGST breakup.
HSN Code Finder
Find the right HSN code and GST rate for your goods in seconds.
GSTIN Verification
Verify any GST number: business name, status and filing compliance, free.
GST Late Fee Calculator
Compute late fees for delayed GSTR-1, GSTR-3B and GSTR-9 filings.
E-Way Bill Calculator
Check e-way bill validity and distance rules for your consignment.
Frequently asked questions
Where do I start with GST?
The Start Here guides cover the essentials — what GST is, current rates, registration and the two core returns.
Are GST rates current here?
Rates follow CBIC notifications including GST 2.0 changes. Each guide links its notification — confirm before invoicing.
Which guides cover penalties?
The Notices & penalties section covers DRC-01/ASMT-10 replies, GSTAT appeals and fraud-case guides.
Where are calculators?
The GST Tools section below links the GST calculator, HSN finder, GSTIN verification and late-fee utilities.
Need help filing? Get Free Consultation — fixed fees, CA-reviewed, on-time filing.
ITR, GST returns, notices and registrations — fixed fees, human support, on-time filing.
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