GST ITR turnover

Section 2(6) of the CGST Act 2017( please refer) defines, aggregate turnover, so turnover includes 

1) Taxable supply you made 

2) exempt supplies 

3) export of Goods or services 

4) inter-state suplies

to be computed on all India basis, but excluding CGST , SGST , UTGST & IGST ,so in my opinion you have to exclude all GST taxes and show turnover. 

However you take more opinion on this.

Whatever you are collecting GST taxes that you deposit  with Government account , that is not your income, so you have to exclude or not to report in ITR . 

You can also refer CBDT clarification, and ICAI guidance note in this case of reporting turnover in income tax return.