---
title: Sales
description: The sale lifecycle, coupons, returns with credit notes, cash sessions, and parked carts.
---

This section covers everything that happens at the counter, from building a cart to closing the cash session.

**[Selling at the counter](/sales/selling-at-the-counter)**

Idempotent sale creation, FEFO deduction, VAT, credit checks, and invoices.

**[Coupons and discounts](/sales/coupons-and-discounts)**

How DEMO10 style coupons validate and apply to a sale.

**[Returns and credit notes](/sales/returns-and-credit-notes)**

Looking up an invoice, validating returnable quantities, and restocking.

**[Sessions and parked carts](/sales/sessions-and-parked)**

Cash sessions, breaks, tender declarations, Z-reports, and parked carts.