Why is the tax amount on this invoice different from the tax amount in Oracle Fusion Receivables?

The tax amount on a contract invoice is an estimated amount that is calculated based on the tax event class Sales Transaction Tax Quote defined in Oracle Fusion Tax. Oracle Fusion Receivables calculates the final tax amounts using the Invoice tax event class.

If the setup for the two event classes differs in Oracle Fusion Tax or changes between the time you create a draft invoice in Oracle Fusion Project Billing and the final invoice in Oracle Fusion Receivables, then the tax amounts shown in the two applications can differ.