Thanks for all who chimed in. My client states they didn't give anyone else permission to file on their behalf but will check with their previous preparer from 2019. I found out after the 3rd time reaching out to support that there was an extension filed by someone else but that's all they can tell me. It seems you don't need the IP PIN to file extension, only the return. Hopefully, I don't run into any issues with filing the return as I have filed the last two years.

I hope this helps someone else in the future. Be persistent, check all options; clerical, previous preparers, IRS, etc. Happy Filing Everyone!!