With Avalara, customer addresses must be captured and will be validated on each tax call. If the address is invalid, no taxes will be returned and there will be an error in the event log.
Before using Avalara, you must identify in advance which jurisdictions you are required to tax and submit this information to Support (firstname.lastname@example.org or Web form). We will then configure your tenant to use the jurisdictions you specify. The sales tax calculations in those jurisdictions are calculated commonly across all accounts and according to the geographical tax rules maintained by Avalara.