how to auto populate Product Fiscal Classification on draft invoice

Summary:

How to auto populate Product Fiscal Classification on draft invoice?

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We are using a third-party tax engine to calculate taxes. For invoices from projects, Product Fiscal Classification field on the draft invoice will be used to populate the tax category code, based on which the tax engine will calculate and apply tax when the invoice is imported in AR.

Is there a way to auto populate Product Fiscal Classification field on draft invoice for cost-based and event-based invoices?

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