Whitholding tax calculation on tax-exclusive total

when i witholidng tax it calculate it from the Total by default.
is its possible to calculate it from the subtotal?
we are in the EU.

Here a invoice has VAT TAX. and we have to withol tax from the net ammount (subtotal) not from the Total where vat tax is included.

any change to change that?

Currently the withholding tax is calculated on tax-inclusive total. I know in some countries, the withholding tax is on tax-exclusive total. Manager doesn’t support automatic calculation on tax-exclusive totals yet but you can enter the amount manually rather than percentage for the time being.