BillmanGST guides for shop owners
Short, practical answers with rupee examples — e-way bills, GSTR-1, HSN codes, e-invoicing and pricing.
E-way bill rules for shop owners: when you need one (2026)
When do you need an e-way bill? The ₹50,000 rule, inter-state vs within-state movement, validity and how to create one — explained with rupee examples.
GST guidesHow to calculate GST: inclusive vs exclusive prices (with examples)
Learn how to add GST to a price and how to remove GST from an inclusive price, plus the CGST, SGST and IGST split — with simple rupee examples.
GST guidesGSTR-1 due dates and filing checklist for small businesses
GSTR-1 due dates for monthly and quarterly (QRMP) filers, what to check before filing, and how to avoid late fees and mismatches.
GST guidesHSN codes on GST invoices: 4 digits or 6 digits?
Which HSN code length to print on your GST invoices: 4 digits up to ₹5 crore turnover, 6 digits above. What HSN and SAC codes are and how to find yours.
Pricing & profitMargin vs markup: price your products right
The difference between margin and markup, how to calculate each, and how to set a selling price for the margin you want — with shop examples.
GST guidesE-invoice: who needs it and how it works (2026 guide)
Who must issue GST e-invoices (turnover above ₹5 crore), what the IRN and QR code are, which invoices are covered, and how to generate them.