How to link tax to installments.....

My problem is that my company sells lifts .... now sometimes even 1 lift goes in more than 1 truck ....

it is our need that we link each truck with a partial invoice... say 70% invoice along with the taxes.....

and the rest 30% with its related taxes.

Help me please ... it is very important..

Thanks in advance

Under Sales Order Parameters, Installments, there is a check box for Apply Tax to Installments. This will apply tax based on the percentage you are invoicing.

Under Sales Order Parameters, Installments, there is a check box for Apply Tax to Installments. This will apply tax based on the percentage you are invoicing.

yes i have seen this parameter but it doesn't get linked to the tax installments.