As per the official website the eligibility for the session 2020-21 is:

HSC passed, as per the 322nd Syndicate resolution held on 10/09/2020 vide item no.99 only for the academic year 2020-2021.

Now you can take this in account to be the eligibility but to get a seat you have to compete to some extent so try to score as much as possible.

To know more about PSGR krishnammal college in Coimbatore you can visit the link provided below:

https://www.psgrkcw.ac.in/admission-process-guidelines/

I hope this answer helps. All the very best for your future endeavors!