Assuming that
1) You are the non-EU family member of an EU citizen
2) You have had biometric EEA RC or EEA vignette for 5 years
3) Your EU family member has exercised treaty rights throughout those 5 years and is still exercising treaty rights, OR has already Permanence Residence
Then you qualify for Permanent Residence under EEA rules yourself, and that's the route you should apply to, not renewing your RC.
Application for PR here:
https://www.gov.uk/apply-for-a-uk-resid ... dence-card
As indicated on that page, you need to apply for the Settlement Scheme before 31st December 2020.
If either 1) , 2) or 3) are not the case, then we need more details of your situation to be able to comment.
My posts express what I believe are the facts, based on the best of my knowledge, about the topics discussed in this forum. They do not constitute immigration advice.
