For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
This page is for APIs, version Calculations.
For other versions, use one of these documentation indexes:
- Overview (default): https://avalara.ferndocs.com/api-reference/overview/llms.txt
- Calculations: https://avalara.ferndocs.com/api-reference/calculations/llms.txt
- E-invoicing: https://avalara.ferndocs.com/api-reference/e-invoicing/llms.txt
- Brazil: https://avalara.ferndocs.com/api-reference/brazil/llms.txt
- Returns: https://avalara.ferndocs.com/api-reference/returns/llms.txt
- Shared service: https://avalara.ferndocs.com/api-reference/shared-service/llms.txt
- 1099 & W-9: https://avalara.ferndocs.com/api-reference/1099-w9/llms.txt
- Tax registrations & business licenses: https://avalara.ferndocs.com/api-reference/tax-registrations/llms.txt
- ECM: https://avalara.ferndocs.com/api-reference/ecm/llms.txt
- Cross-Border: https://avalara.ferndocs.com/api-reference/cross-border/llms.txt
Access control: this endpoint is available to users with the everyone role.
Returns full list of communications transaction types which
are accepted in communication tax calculation requests.
Authentication
Authorizationstring
API Key authentication via header
Headers
X-Avalara-ClientstringOptionalDefaults to Swagger UI; 26.7.0; Custom; 1.0
Identifies the software you are using to call this API. For more information on the client header, see Client Headers .
Query parameters
$filterstringOptional
A filter statement to identify specific records to retrieve. For more information on filtering, see Filtering in REST.
$topintegerOptional
If nonzero, return no more than this number of results. Used with $skip to provide pagination for large datasets. Unless otherwise specified, the maximum number of records that can be returned from an API call is 1,000 records.
$skipintegerOptional
If nonzero, skip this number of results before returning data. Used with $top to provide pagination for large datasets.
$orderBystringOptional
A comma separated list of sort statements in the format (fieldname) [ASC|DESC], for example id ASC.
