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How do I resolve "Tax Liable filed is Un-checked. Please mark it to calculate tax for this document" in Microsoft Dynamics NAV

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Overview

When trying to calculate tax on an invoice it results in the error message, "Tax Liable filed is Un-checked. Please mark it to calculate tax for this document".

Environment

Dynamics NAV

Resolution

  • Sales & Marketing >  Sales > Customers -> Invoicing
  • Check off "tax liable" for Core Services
  • If tax doesn't calculate then the invoice will need to be re-created.