# How to ring up a sale

> Published: 2026-06-30
> Updated: 2026-07-08
> Category: Run
> Canonical: https://finalpos.com/help/ring-up-a-sale

To ring up a sale, open a session, then add products from the Catalog — tap their tiles on the grid, search, or scan a barcode. Items collect in the cart, where you can change quantities, apply discounts, or remove lines. When you're done, tap your flow's checkout button to take payment.

## Key takeaways

- Open a session first — sales are recorded against an open session.
- Add products from the Catalog by tapping their tiles on the grid, searching, or scanning a barcode.
- Items collect in the cart, where you can change quantity, apply a discount, add a note, or remove a line.
- Add off-catalog items with a Custom Sale.
- Tap your flow's checkout button to go to payment.

## Before you begin

Before you ring up a sale, you need an open session — see "How to open a session." Your selling screen's exact layout and buttons are defined by your flow, so what you see can vary, but the steps below work the same way.

## Step 1 — Add items to the cart

On the selling screen, the **Catalog** tab shows your products as a grid of tiles. To add items:

- **Tap a product tile** to add it to the cart. If the product has options or variants (like size or color), choose the variant when prompted.
- **Search** the catalog by name to find a product quickly.
- **Scan a barcode** to add the matching product, if you have a barcode scanner connected.
- For something that isn't in your catalog, switch to the **Custom sale** tab to add a custom-priced item. (See "How to make a Custom Sale.")

Each item you add appears in the **cart**.

## Step 2 — Review and edit the cart

Tap a line in the cart to edit it. You can:

- **Change the quantity** (or use the +/– controls).
- **Apply a discount** to the line.
- **Add a note** or adjust other line details.
- **Remove** the item.

The cart keeps a running total — including tax — as you add and edit items.

## Step 3 — Go to checkout

When the order is complete, tap your flow's **checkout / pay** button (the exact label is set by your flow) to move to payment. From there you choose how the customer pays — see "How to take a payment."

> **Tip:** If you need to step away mid-order, you can park the order and come back to it later.

## FAQ

**Q: How do I add a product that isn't in my catalog?**
A: Switch to the Custom sale tab and add a custom-priced item.

**Q: Can I change a quantity or remove an item?**
A: Yes — tap the line in the cart to change the quantity, apply a discount, add a note, or remove it.

**Q: How do I add an item by barcode?**
A: With a barcode scanner connected, scan the product's barcode and it's added to the cart.

**Q: Why don't I see the products or buttons I expect?**
A: Your selling layout is defined by your flow. If something's missing, ask whoever manages your flows.

**Q: Nothing happens when I try to check out.**
A: Make sure a session is open and the cart isn't empty.