it would seem that for federal purposes a partnership return need to be filed eaxh year.
under current law there is no termination of the partnership for federal purposes
see this link we're post TCJA
https://www.irs.gov/newsroom/questions-and-answers-about-technical-terminations-internal-revenue-cod...
the transfer if partnership interest may result in tax consequences for both the terminating members and new members
section 751 may affect the terminating partners
