UPDATE: Interest income received by LLC 2 years after "final return" was filed due to sale of biz

I sold my business (owned in an LLC) in 2019 and filed a final Form 1065 in 2020 (note, I still have the LLC, only the biz was sold).   In 2022 the LLC unexpectedly received an IRS refund (refund of a previously paid filing penalty) including taxable interest income.  I assume I need to now file a Form 1065 for 2022 (and a state filing) which would only report the interest income, and distribute K-1s to the partners.  Is this accurate?  Since my 2019 return was marked as a "Final Return" will I have any issues with the IRS filing a 2022 return?  Thanks!