PTRC/PTRM enrollment under GST

If you have employees having salary above 7500 p.m , it is compulsory to register under PTRC.

PTEC is mandatory for business.

It is a compliance required under law so nothing to discuss about advantages. There is no Disadvantage either.

If you do not comply, interest and penalty shall follow.

PTEC is mandatory for business- Is this required to my business? and what mean by PTEC?
How much interest and penalties chargeable as the I have received letter in Mar20.

For Maharashtra state

PTEC is to be paid by proprietor,partner,Director,company and LLP for doing business/profession in the state. Annually Rs. 2500 tax , interest @ 1.25% p.m for first 30 days delay, 1.50% p.m for next 60 days and 2% p.m thereafter. Penalty not payable if registered voluntarily before initiation of show cause notice by govt dept.

Yes it is required for your business.

Then I need to have pay annually tax FY 201718, FY201819 with Interest as I have got GSTIN in Sep17.
Am i right?

If you were doing business even before that,then you have to pay for those years also.

For now, you need to pay FY 1718,1819,1920 AND 2021.