Get your taxes done using TurboTax

is schedule L completed on your K-1

it is supposed to be on the tax basis

so if this is true you basis would be:

beginning capital +

capital contributed +

current year net income OR -

current year net loss -

distributions that were not your final distribution =

your tax basis

 

hopefully, your tax basis  is the same as your final distribution

in theory, if you've owned the same interest since it began and there were no special or disproportionate allocations in any year your basis should equal the final distribution so no gain or loss.