> ## Documentation Index
> Fetch the complete documentation index at: https://www.billingserv.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Invoice Settings

> Configure invoice numbering, payment timing, currency, tax details, and billing options.

## What this page is for

Invoice Settings controls the defaults used when BillingServ creates and manages invoices.

## Main settings

* Return URL after an order
* Invoice prefix and starting number
* Payment due period
* Late fees and the tax treatment of late fees
* Payment reminders and suspension timing
* Default currency, supported currency, and exchange rate
* Company VAT name, VAT number, and VAT failure limit
* Company registration number
* Fixed discounts, discount codes, and electronic invoicing

## Settings explained

* **Order return URL**: The URL customers are sent to after an order flow completes.
* **Invoice prefix**: Text placed before generated invoice numbers.
* **Invoice start number**: The starting number used when numbering invoices.
* **Payment due**: The default time allowed before payment is due.
* **Late fee**: The late-fee amount or rule applied to overdue invoices.
* **Late fee tax class**: The tax class used for late fees.
* **Automatic invoice reminder**: The timing for sending reminders on unpaid invoices.
* **Invoice reminders before suspension**: How many reminders are sent before service suspension handling.
* **Send invoice**: Controls when a newly created invoice is sent.
* **Default currency**: The currency used by default for billing.
* **Currency dropdown**: The currencies available for selection where a customer or order can choose a currency.
* **Currency exchange fee**: The exchange-rate adjustment used when converting currencies.
* **VAT name and VAT number**: The business VAT details printed or used for tax processing.
* **VAT lookup max failure**: The number of failed VAT lookups allowed before the platform stops treating the lookup as successful.
* **Company registration number**: The company registration identifier used on billing documents.
* **Enable fixed discount**: Allows fixed discount rules to be used.
* **Enable discount code**: Allows customer-entered discount codes to be used.
* **Enable e-invoice**: Enables electronic invoice handling where supported.

These are account-wide defaults. Review them carefully before changing them, especially the invoice prefix and starting number.