How to use multiple WHT codes on single line without using Tax grouping or Tax rules?

Summary:

We have a scenario where user want to use multiple withholding taxes on single invoice line, also they don't want to use any Tax grouping or Tax rules. As there are several scenarios and for covering all the scenarios we will have to create around 100 rules or groups.

Withholding is Sales tax withholding and income withholding.

Also they wants to achieve this goal using FBDI upload process.

They have Sales Tax, then WHT for this sales tax and Income Tax Withholding.

How to fulfil this requirement?

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