Avalara pointed us to their terms for info on how they compute our fee:
https://www.avalara.com/us/en/legal/avatax-terms.html
1.TRANSACTION CALCULATIONS
a. Transaction Usage. Fees for usage of AvaTax are based on the number of Transactions used in AvaTax by Customer. Avalara will charge a number of "Transactions" used each day equal to the greater of the results of (i) or (ii) below:
i. The number of Documents recorded; or
ii. The number of API calls to the tax calculation service recorded, divided by 10.
In addition to the Transactions counted under (i) or (ii) above, every 10 API calls to the address validation service, other than API calls that are specifically associated with a tax calculation, will count as one Transaction. The number of Transactions used will be measured on a daily basis. For purposes of calculating Transactions used, fractional Transactions will be rounded up to the next whole number.
b. Document Definition. A "Document" is any record that is entered, uploaded, or otherwise recorded in AvaTax by Customer. Documents include, for example, committed sales invoices, purchase invoices, inventory transfer invoices, return invoices, and committed ecommerce shopping carts. Each such record will count as one Document for purposes of calculating usage of AvaTax, as will each subsequent alteration of the record. All such records will be considered Documents, regardless of the tax result generated by AvaTax, except for records on which no tax is calculated solely because the Customer has configured AvaTax to not calculate tax because the Customer does not have nexus in that jurisdiction. For purposes of calculating Document usage, each Document is assumed to have 35 or fewer invoice lines. If the ratio of invoice lines per Document exceeds 35/1 in any day, the number of Documents counted for that day will be the total number of invoice lines in that day divided by 35.
c. Global Transactions.
i. International Tax Transactions. If Customer records any Documents or API calls for which the ship-from and ship-to addresses are in different countries, Avalara will count such Documents or API calls as "International Tax Transactions." International Tax Transaction usage is calculated using the methodology set forth in Section 1(a) (Transaction Usage) above, and the specific number of Transactions used for each International Tax Transaction will be 1.15 Transactions.
ii. Customs Transactions. If Customer records an International Tax Transaction that includes a pre-classified harmonized tariff code, then Avalara will count the customs duty and import tax calculations performed as a "Customs Transaction." Customs Transaction usage is calculated using the methodology set forth in Section 1(a) above (Transaction Usage), and the specific number of Transactions used for each Customs Transaction will be 1.75 Transactions.
iii. Estimated Customs Transactions. If Customer configures AvaTax to provide estimated customs charges based on Customer's item description, Avalara will count the customs duty and import tax calculations performed as an "Estimated Customs Transaction." Estimated Customs Transaction usage is calculated using the methodology set forth in Section 1(a) (Transaction Usage) above, and the specific number of Transactions used for each Estimated Customs Transaction will be 2.0 Transactions. Customer is responsible for any variance between the estimated customs charges in the Estimated Customs Transaction and the actual customs charges owed to an applicable government authority.
iv. The Accuracy Guarantee does not apply to the Services set forth in this Section 1(c) (Global Transactions).
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Wayne Schulz
Schulz Consulting
860-516-8990
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