GP 2013 - Long integer out of range, results invalid
Overview
When doing an tax calculation on invoice, customer is getting "Long integer out of range, results invalid"
Environment
GP 2013
Resolution
Sometimes, there are issues with transactions in GP in which they were created before the installation of Avatax. Code or configurations behind the scenes may be causing these issues. We determined that this was this the case because we created a new invoice with the exact same information and was able to do tax calculations.