Related to sec 44ad

The assessee can calculate the turnover by aggregating the amounts stated in sales invoices and other documents issued for the purpose of collecting indirect taxes.

However he must provide the following documents to the AO to prove that his calculation is correct:

 - copies of invoices issued during the PY

- copies of cash memo

 - copies of Purchase bill

- Bank statement

- Inventory details, if any maintained

 - Average G.P rate applicable to Particular business

 - Returns filed under sales tax/vat/excise/service Tax laws.