turnover

Turnover means sale for a financial year.
There are different concept of turnover in GST... Aggregate Turnover/Turnover in state/Turnover in union territory. You may refer Chapter 1 preliminary !!!!

“aggregate turnover” means the aggregate value of all taxable supplies
(excluding the value of inward supplies on which tax is payable by a person on reverse
charge basis), exempt supplies, exports of goods or services or both and inter-State
supplies of persons having the same Permanent Account Number, to be computed on all
India basis but excludes central tax, State ta x, Union territory tax, integrated tax and cess;

No....
Turn over is only Outward supplies. It's not include Tax values only on basic Values....