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How do I resolve 'ATS-291: Index was out of range. Must be non-negative and less than the size of the collection.' in QuickBooks?

Overview

You are trying to calculate tax on an invoice but receive error "Index was out of range. Must be non-negative and less than the size of the collection."

Environment

QuickBooks Desktop

Resolution

  • In AvaTax for Quickbooks version 84 this is a known error.

  • To resolve, upgrade to version 85. Download the latest version of your integration under  Home > Get Started > Download and Install your Integration Software. (Link for Production Admin Console)