Ensure taxes are calculated at the invoice header for all customers of an Operating Unit

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Database Server

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RDBMS : 19.0.0.0.0

Oracle Applications : 12.2.11

EBS Tax/AR

Issue: Currently taxes are calculated and rounded at the invoice line level and this is causing penny rounding that can increase the invoice total more than if the taxes were to be calculated at the header level. It's pennies but customers are detailed oriented. (Customer has a check on their side to validate exact invoicing).

Looking for a sure-fire way to make sure all customer invoices have taxes calculated at the invoice header level.

Thank you in advance.