> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/adobe-commerce-extension/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/adobe-commerce-extension/2.2.0/appendix-1.md).

# Appendix

## Exhibit A: Eligible tax group, type, and code

[Click this link](https://docs.digitalriver.com/digital-river-api/product-management/creating-and-updating-skus#tax-code) to learn which tax codes are available in the Digital River API. 

A Digital River account is required to use this extension. If you do not have a Digital River account, you can sign up for one [here](https://dashboard.digitalriver.com/signup).

## Exhibit B: Sequence diagram 

{% file src="/files/-Me0JS8iIbA8g\_8W3muf" %}