GST & business guides

Plain-English answers on GST invoicing, e-invoicing, e-way bills and running a small business in India.

All GST Basics 5 e-Invoicing 2 Business Tips 3

GSTR-1 and GSTR-3B due dates calendar 2026-27 with GST return forms and late fee warning — BikriBook

GSTR-1 and GSTR-3B Due Dates 2026-27: Calendar, Late Fees & QRMP Guide

Full GSTR-1 & GSTR-3B calendar for 2026-27: monthly due dates, QRMP quarterly dates, late fees, interest, and 1-click GSTR report from BikriBook.

22 Sep 2026 · 4 min read

GST invoice format in Excel PDF and Word 2026 — tax invoice with HSN, CGST SGST IGST split — BikriBook free download

GST Basics

GST Invoice Format in Excel, PDF & Word — Free Download 2026 (CGST/SGST Ready)

Download GST-compliant invoice format — free Excel, PDF & Word for 2026. With HSN, CGST/SGST/IGST split, round-off & signature. Plus 30-sec auto version in BikriBook.

13 Sep 2026 · 3 min read

HSN code list 2026 table with GST rates 0% 5% 12% 18% 28% on laptop and phone — BikriBook HSN Finder

GST Basics

HSN Code List with GST Rates 2026: Chapter-wise Finder + How to Search

Every product needs the right HSN code — wrong HSN means GST notice. Get chapter-wise HSN list with GST rates for 2026, plus 10-sec search trick using BikriBook's free HSN Finder.

11 Sep 2026 · 4 min read

GST Basics

What Is a Pakka Bill? GST Tax Invoice Rules Explained Simply

A pakka bill is simply a GST tax invoice. Here is exactly what it must contain, when you must issue one, and how it differs from a kaccha bill.

02 Aug 2026 · 3 min read

GST Basics

GSTR-1 and GSTR-3B: What They Are and When to File

Two returns confuse most small business owners. Here is what each one reports, when it is due, and what happens if you file late.

25 Jul 2026 · 2 min read