I am testing a transaction with a single line item and Avatax is calculating more tax than appropriate.
Please be sure to see the all line items in your final invoice calculation when comparing tax results from Avatax to what you're expecting.
The tax amount of the total is the amount of tax calculated for the entire document, including all line items.
Note: In general, you can check and adjust tax calculations at the line item level by using Review these calculations. To change the tax calculations for a line item, click the expand arrow next to the line item you want to adjust and then click Review these calculations.
On the tax calculation page, review how taxes were calculated for this line item and get help with any changes that you might want to make. This page can help you change the rate used to calculate tax on the item, change whether or not you collect taxes in this jurisdiction, change the address used to calculate tax, and more.
See also: Edit, commit, and cancel transactions