# Invoice Fields

What every field on the invoice form means.

Most of the invoice form fills itself once you pick a customer. The table below covers what each field decides, and which of them you are ever likely to change by hand.

*Fields on the New Invoice form.*

| Field | What it does |
| --- | --- |
| Customer (required) | Who the invoice bills. Fills the addresses and the terms. |
| Invoice number | Assigned from your number series; editable where your settings allow. |
| Invoice date (required) | The date the invoice is raised. The due date counts from it. |
| Due date | When payment is expected. Filled from the customer's terms, editable per invoice. |
| Line items (required) | What is being billed: item, quantity, rate, tax. |

![The Invoice Details section of the invoice form: Invoice Number and Invoice Date are required, alongside Reference Number, Due Date, Terms of Payment set to Net 30 Days, Salesperson, Accounts Receivable and Subject.](https://www.sorviai.com/help/invoices/invoice-fields.png)

*Terms of Payment drives the due date, so changing one moves the other.*