GST billing setup: document type, rounding and delivery orders

A useful billing setup starts with the business facts: registration status, the supplies being made, applicable rates and who is liable for the tax. The document should follow those facts.

This guide describes Keystonne OS behavior and points to primary references. Have your accountant check the current rules and your restaurant's classification before using a setup for service.

Record the registration and review the document

Keystonne selects the document type from the recorded registration status. Its regular-registration path prepares a tax invoice; composition and unregistered paths use its bill-of-supply format without collecting GST from the customer.

The legal treatment depends on the actual supply. Section 31 of the CGST Act distinguishes tax invoices and bills of supply, including the treatment of exempt supplies and composition suppliers. An unregistered business must not collect tax as though it were registered.

Review the business identity, registration and applicable supply details on an example document. A software label is not a substitute for that review.

Understand how the software rounds

Keystonne computes amounts in exact paise and applies its configured invoice-level, per-head rounding behavior. Its tests check the resulting tax heads and document totals. This avoids relying on floating-point approximations in the calculation.

Section 170 of the CGST Act addresses rounding sums payable or due under the Act to the nearest rupee. It does not itself specify every step of a POS invoice algorithm. Reconcile sample documents and the accounting export with your accountant's expected treatment.

Classify covered delivery supplies separately

For restaurant services notified under Section 9(5) and supplied through an electronic commerce operator, the operator is liable for GST. That treatment does not automatically cover every item or service sold through a delivery app. CBIC Circular 167/23/2021-GST explains the restaurant-service treatment and the distinction from other supplies.

Keystonne marks orders configured for Section 9(5) separately instead of adding the restaurant's tax again. Confirm which supplies belong in that path. A channel label alone does not determine the correct tax treatment or current return requirements.

Test a representative set before opening

• Check the business details and document type against the recorded registration.
• Review applicable rates and their effective dates.
• Include the counter, direct and delivery-channel cases your restaurant uses.
• Compare the bill, operational register and accounting export.
• Keep statutory filing with your accountant; Keystonne does not submit returns.

The setup guide brings these checks together with the menu, printer and kitchen handoff. Revisit the setup when your registration, supply mix or applicable rules change.