AP Invoice withholding wrong tax rate

Summary:

Greetings dear experts, we set up a tax rate and assigned to a withholding tax. However, when AP Invoice is validated, the tax rate percentage is different from the one defined in the setup

Content (required):

Withholding Tax Rate Percentage 4.5:

Invoice Calculated Percentage:

Would you please help us find the reason why when Invoice Validation is run wrong percentage is calculated for expected behavior?

My best regards

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