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Why am I getting a TAV tax class mapping error after a Sage 500 Update?

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Overview

You have just ungraded to the newest build of Sage 500 for version 7.6 and now when you calculate tax you get an error stating the table TAV tax class mapping does not exist. 

Environment

Sage 500

Resolution

  • The table TAV tax class mapping is created by the newest builds of the software on installation (it is a new feature as of January 2015), but it is not installed if the previous version is not uninstalled prior to installation.
  • Uninstall Avalara on the server, then reinstall the new build to create the table and resolve the error