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Why am I receiving error "Unknown country name or code (0)" when attempting to calculate tax in Microsoft Dynamics GP?

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Overview

You've checked the address on the customer card, but when attempting to calculate tax, you still receive error "Unknown country name or code (0)."

Environment

Microsoft Dynamics GP

Resolution

  • Click the transaction in Microsoft Dynamics GP
  • Highlight the line of the transaction and click show detail
  • Review the address at the line-level
    • Click the Blue Arrow next to the ship to address
  • Update the Country field
  • Recalculate tax on the transaction