sales returns

Sir, have u sent goods on sale or return basis.
also when invoice has been raised and when goods has been removed for export?

Raise credit note(Unregistered) in table 9B linking to original invoice and fill amount with value of returned goods.
since it was zero rated supply under LUT no tax effect arises.

or

Amend original export invoice raised, under table 9A by giving reference to original invoice number and make amount to "zero ".