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


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)."


Microsoft Dynamics GP


  • 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