NordInvoice / EN 16931 / BT-137
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BT-137Invoice line allowance base amount
BT-137 (Invoice line allowance base amount) is a business term of EN 16931, the European e-invoicing standard. This page shows where the field lives in a UBL invoice, how often it may appear and which validation rules check it.
Base for the line discount percentage.
Browse the interactive EN 16931 mapper Check your invoice in the free validator