Section 13C(1) in Andhra Pradesh General Sales Tax Act, 1957
(1)Every dealer whose total turnover is not less than rupees two lakhs in a year, shall issue a bill or cash memorandum in such form and with such details of tax collected as may be prescribed, for every sale involving an amount not less than rupees one hundred:Provided that every dealer including a dealer whose turnover is less than rupees two lakhs shall issue a sale bill in the proforma prescribed, irrespective of the amount of sale, when demanded by the buyer.