Is there way to calculate tax based on another tax, Eg: there are two taxes Excise 10%, VAT 15% if net price is 100,
Excise tax = 100*10%
VAT = (NET + EXCISE) * 15% = ( 100 + 10) * 15% = 126.5
GROSS = NET + EXCISE + VAT
And go the tax into two accounts separately and show separately
but not all products has EXCISE
I think that is not possible with standard Dolibarr’s version
I made this plugin about five years ago - yon can check it with this link
But your problem need to update it, because not all products have extended tax…
Try adding an extra line item computation field and give the formula. the objects supported or $object, $mysoc etc. You just need to use var_dump() and figure out your variable one and create the formula.