# Page Not Found

The URL `checkouts/creating-checkouts/tax-identifiers` does not exist.

You might be looking for one of these pages:
- [Tax identifiers](https://docs.digitalriver.com/digital-river-api/integration-options/checkouts/creating-checkouts/tax-identifiers.md)
- [Selling entities](https://docs.digitalriver.com/digital-river-api/integration-options/checkouts/creating-checkouts/selling-entities.md)
- [Tax calculation inputs](https://docs.digitalriver.com/digital-river-api/integration-options/checkouts/creating-checkouts/tax-calculations.md)
- [Checking out guest and registered customers](https://docs.digitalriver.com/digital-river-api/integration-options/checkouts/creating-checkouts/using-the-checkout-identifier.md)
- [Providing an upstream identifier](https://docs.digitalriver.com/digital-river-api/integration-options/checkouts/creating-checkouts/providing-an-upstream-identifier.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.digitalriver.com/digital-river-api/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.digitalriver.com/digital-river-api/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/digital-river-api/integration-options/checkouts/creating-checkouts/tax-identifiers.md`)
- Use `Accept: text/markdown` header for content negotiation