Freelancer Tax

Hi Members,

I have filed my ITR for FY 2020-2021.

Since 1 September 2021 I am working as a freelancer. Prior to that I was working full time at one company.

I am interested in paying Advance tax (Presumptive tax ) under section 44ADA.

1. From April 2021 to August 2021 I had a full time job. Which ITR should I choose ?

2. Can someone guide what are the dates for paying Advance tax ?

3. Am i eligible for paying advance tax under Section 44ADA ?

4. Consider an example lets say i have gross receipts of 1.5 LPA per month starting from September 2021 to March 2022. How much tax should i need to pay ?