because we have no info about the LLC, this may be incomplete
you had a partnership return due for 2021. since it was liquidated in September the return was due on or about 12/15/2021. it is now 3 months late. penalties for late filing are about $400/month.
the LLC would report operations through the date of dissolution. after that, if it was a business other than a rental activity. each of you would need to complete a schedule c for the period from the date of dissolution through 12/31/2021 or two schedule e's if rental real estate.
