Composition tax return DVAT 17 requires reporting total sales, composition rate, tax computation, payments, TDS and authorised verification. Form DVAT 17 requires dealer identification, tax period, total sales, composition tax rate, computation of output tax plus interest and penalty, credits for tax paid and TDS, and the net payable or refundable amount; it also requires challan/payment details, attachment of TDS certificates and proof of payment, a note explaining revisions when filing a revised return, and a signed verification by an authorised signatory.