Ideas

The Extra VAT collected is basically a type of extra charge which Customer pays as part of Promotional Items. Wheras GINESYS Client is liable to Pay actual applicable TAX on the collected amount (NETAMT). 

Thus the current assumption that Repopulate will not effect the Extra VAT rows is not valid and this needs to be corrected.

In the new proposed process the TAX details (RATE / AMOUNT / DESCRIPTION) will get repopulated as per applicable VAT % but the EXTRA VAT (Collected) amount will remain same as the collection will not change.