Glossary

Term	Meaning
B2B	A sale to a GST-registered business.
B2CL	A large inter-state sale to an unregistered buyer.
B2CS	Any other sale to an unregistered buyer.
BOM (bill of materials)	The components needed to make one unit of a product.
CGST, SGST	Central and state GST, charged on sales within a state. Each is half the rate.
COGS	Cost of goods sold: net units sold × cost per unit.
Credit note	A document that reduces what a customer owes, after an invoice was issued.
Debit note	How the app records a credit note received from a supplier.
Dr, Cr	Debit and credit. On a ledger, Dr means they owe you and Cr means you owe them.
E-way bill	A government document for moving goods above a value limit.
Financial year (FY)	1 April to 31 March.
GSTIN	The 15-character GST number. The first two digits are the state code.
GSTR-1	The monthly or quarterly return of your sales.
GSTR-2B	The portal's statement of input credit available, based on suppliers' filings.
GSTR-3B	The summary return where you pay your tax.
HSN, SAC	Codes for goods (HSN) and services (SAC).
IGST	Integrated GST, charged on sales between states.
IMEI	A phone's unique identifier. The app treats it as a serial number.
ITC (input tax credit)	GST paid on purchases that you can set against GST on sales.
Ledger	The account for a customer or supplier.
MCP	Model Context Protocol, the standard AI assistants use to connect to apps.
Place of supply	The state a sale counts as made in. It decides CGST + SGST or IGST.
Proforma invoice	An invoice-style offer, not a tax invoice. It has no effect on your books.
Receipt	Money you received.
Set-off	Using input tax credit to pay the GST you owe.
SKU	Your own code for a product.
SMTP	The standard for sending email.
Voucher	Any accounting entry: invoice, receipt, payment or credit note.