Short, practical guides to invoicing: what a GST invoice must contain, CGST vs IGST, HSN codes, invoice numbering, writing amounts in words, and which document to use when.
All guides
GST Invoice RulesGST invoice rules in plain English: the fields Rule 46 requires, copies, time limits, HSN digits, unregistered…OpenCGST, SGST and IGST on an InvoiceHow to decide between CGST plus SGST and IGST on an invoice, using the place of supply, with worked examples and…OpenHSN and SAC Code on InvoiceHSN and SAC codes on invoices explained: digits by turnover, B2C relief, where to print the code, the HSN summary…OpenInvoice Number FormatInvoice number format rules and examples: 16 characters, unique per financial year, series by branch or type, and…OpenAmount in WordsHow to write an amount in words on invoices, cheques and receipts, in lakh and crore or million style, with paise,…OpenInvoice vs Bill vs Receipt vs QuotationInvoice vs bill vs receipt vs quotation, proforma, challan and voucher explained with a simple timeline of a sale,…Open
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Checked and updated 14 Oct 2026. Independent template site; not tax or legal advice.