levy of tax

Yes.

Under composition scheme, rate of tax is payable on the ‘turnover in a State’.

As per Section 2(112) of the CGST Act, 2017, turnover in State or turnover in Union territory 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) and exempt supplies made within a State or Union territory by a taxable person, exports of goods or services or both and inter-State supplies of goods or services or both made from the State or Union territory by the said taxable person but excludes central tax, State tax, Union territory tax, integrated tax and cess.

Yes. Exactly....

Composition dealer ll be pay tax on his All sales Turn over.

The goods are any if Taxable goods, Exempted goods and Nil rated goods... These all values (Total) is Taxable...