> For the complete documentation index, see [llms.txt](https://support.onfact.eu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.onfact.eu/basic-modules.md).

# BASIC MODULES

- [Customers](https://support.onfact.eu/basic-modules/customers.md)
- [Products](https://support.onfact.eu/basic-modules/products.md)
- [How Can I Update My Product List (e.g. Price Changes)?](https://support.onfact.eu/basic-modules/products/how-can-i-update-my-product-list-e.g.-price-changes.md)
- [Proposals](https://support.onfact.eu/basic-modules/proposals.md)
- [Invoices](https://support.onfact.eu/basic-modules/invoices.md)
- [Credit Notes](https://support.onfact.eu/basic-modules/credit-notes.md)
- [Payments](https://support.onfact.eu/basic-modules/payments.md)
- [Incoming Payments](https://support.onfact.eu/basic-modules/payments/incoming-payments.md)
- [Outgoing Payments (Purchases)](https://support.onfact.eu/basic-modules/payments/outgoing-payments-purchases.md)