Gross turnover audit threshold aligned with income tax law; procedural VAT form and rate amendments require updated dealer records. The amendment adds rule 42A requiring dealers whose gross turnover exceeds the audit limit under the Income Tax Act to obtain an accountant's audit under section 49, aligns a proviso rate in rule 7A to a higher figure, omits specified sub clauses in rules 6A(1) and 7(1)(e), and revises Forms DVAT 16, 17, 20, 30 and 31 to mandate month wise purchase and sale summary annexures, include purchases from unregistered dealers, revise registration wording to TIN/TAN, and provide specimen purchase and sales registers categorizing transactions for input tax credit purposes.