Inserting withholding tax into past transactions

Hello, is there any way in which the WHT can be inserted in all the past sales invoices in the quickest manner where funds are already rcvd as lot of invoices are already raised in this manner…
Plsd to hear,

@RAM93, your post was moved to a new topic because it was unrelated to the one where you posted it. Please do not divert topics. See FAQ - Manager Forum.