Section 105(3) in The Delhi Value Added Tax Act, 2004
(3)Where an amount is paid or received prior to 1st April, 2005 in respect of a sale or purchase occurring after 1st April, 2005, and the person calculates his turnover or turnover of purchases based on amounts paid and received, the amount shall be treated as forming part of the person's turnover or turnover of purchases in the tax period in which the sale occurs.