> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://avalara.ferndocs.com/docs/get-certified/calculation/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://avalara.ferndocs.com/_mcp/server. # Calculation > API solutions for end-to-end tax compliance. ## Docs - [Sales Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/sales-tax.md) - [Use Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/use-tax.md) - [CDIT (Customs Duty & Import Tax) badge](https://avalara.ferndocs.com/docs/get-certified/calculation/cdit-customs-duty-import-tax.md) - [VAT badge](https://avalara.ferndocs.com/docs/get-certified/calculation/vat.md) - [Communications Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/communications-tax.md) - [Excise Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/excise-tax.md) - [Brazil Services Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/brazil-services-tax.md) - [Brazil Goods Tax badge](https://avalara.ferndocs.com/docs/get-certified/calculation/brazil-goods-tax.md) - [Tax Content badge](https://avalara.ferndocs.com/docs/get-certified/calculation/tax-content.md)