The non recoverable tax amounts of the AP Invoice lines from receipts match are calculated incorrect

Hi,

I have setup a non recoverable tax code 17%. I also created a ap invoice whose lines are from new created po and receipts. The amount in PO includes tax. For the manaul created ap invoice line, the tax is calculated correctly. For example, input amount is 117, after clicking calculate tax, the original amount 117 is changed to 100 and a new tax type line with amount 17 is created. But for the amount 117 from receipt match, same tax code, Oracle calculate the tax by 117*0.17 instead of 117->100 then *0.17. I uploaded the screen copy, the first