have you tried tax package support website to see if the partnership is listed and then you could check to see if you got a k-1. there is an availability date by each. They even have a phone number to call.
https://www.taxpackagesupport.com/
otherwise, I would take the position that you will not be issued a k-1 and even if you were all lines would be zero Thus. I would report the sale using your purchase price as your tax basis.