Tax assessable value column should be available on the PO and SO line, which should allow the calculation of VAT/Sales Tax on the assessable value instead of the line amount. There are regulatory requirements in many regions which require VAT/Sales tax to be calculated on the original price for Free of cost items. Now, since these items are Free of cost, the line amounts are entered as zero and hence tax can't be calculated. If the Assessable value field is left blank, then the tax should be calculated on the line amount.

This function is available for the India regulation so can this be please made available for all localization.