GST guides
Plain-language answers to the questions small businesses ask most about invoicing in India. Updated October 2026.
How to make a GST invoice: every field you needThe details a tax invoice must carry under the CGST Rules, when to issue it, and how many copies to keep. 6 min readCGST, SGST or IGST? Place of supply in plain wordsSame state means CGST + SGST; different state means IGST. Here is how to tell which applies. 5 min readHSN and SAC codes: what they are and how many digits you needHSN classifies goods and SAC classifies services. Your turnover decides how many digits to print. 4 min readInvoice, estimate, proforma or bill of supply: which to useFour documents that look alike but mean different things for tax and payment. 4 min read7 ways to get paid faster as a small businessPractical habits, plus the legal protection MSMEs have against late payment. 5 min read