When trying to create an estimate using advanced inventory and choosing a site for inventory to be delivered from I get the above message and the audit shows the address is all showing up on line 3 in the soap details. Even turning off address validation and making sure the ship to for the estimate is marked as default, I still get the error.
Quickbooks 2014 with Advanced inventory, Avatax 68.1 Windows 7
Reviewing the Site address revealed there was a phone number as the last line causing the address validation to misread it.
123 Main Street
City, State, Zip
Removing the phone number on the Site address and saving corrected the address error.