# Invoicing in Veterian

The billing guides for Veterian — building an invoice from treatments and products, recording payment, and the two ways a discount can be applied.

An invoice brings together what the clinic did and what the client owes for it. Treatments logged on a visit arrive on the invoice already listed; products and services are added on the invoice itself.

Invoicing is also where stock moves: adding a product to an invoice deducts it from inventory.

## Start Here

[Create an invoice](/billing/create-an-invoice) covers the whole flow — selecting the client, adding lines, the invoice details drawer, and recording payment as you save.

## Guides in This Section

| Guide | What it answers |
|---|---|
| [Create an invoice](/billing/create-an-invoice) | The lines, the summary, tax-inclusive entry, recording payment, statuses, e-documents, and what deleting an invoice affects |
| [Discounts](/billing/discounts) | The two methods, how to change or remove a discount, and the legacy method on older invoices |
| [Record a payment](/billing/record-a-payment) | Recording money received, applying it across unpaid invoices, and what deleting a payment does to them |

## Worth Knowing First

- **Check the invoice before issuing an e-document.** Once an e-invoice has been sent, the invoice cannot be edited.
- **The two discount methods produce different tax figures**, even though the page shows the same total. Which one you pick matters at filing time.
- **Deleting an invoice does more than remove it** — stock returns and recorded payments are re-applied. The confirmation lists what will be affected.

## Related

- [Record a treatment](/visits/record-a-treatment) — where invoice lines come from
- [Record a visit](/visits/record-a-visit) — checkout, where most invoices begin
- [Hospitalization](/visits/hospitalization) — billing a stay before you empty the box