Topic: Negative tax
In Indonesia, that is a tax that reduce the total amount of invoice (it's called PPH 21). For example the total invoice is 10.000. The VAT for this order is 1.000 and the tax for PPH 21 (2%) is 200. But the 200 is not like VAT which add the total amount, it reduces the total amount. SO the calculation is like this : 10.000+1.000-200=10.800. Is it possible to do this? Yesterday, I modify the code in tax entry so that negative value to be allowed and it works fine (I deleted the >0 check in can_process function). It solve the problem but is it the right thing to do?