here's a link to a worksheet to compute your partnership tax basis.
https://tax.thomsonreuters.com/content/dam/ewp-m/documents/tax/en/pdf/other/quickfinder-updates/qpep...
i would say the result (tax basis) you should end up with is
cash + tax basis of other property you put into it
plus or minus the net income or loss for all years ( all items on the K-1's that affect your tax basis - this would include non deductible expenses)
less any cash + FMV of property distributed to you.
you got paid X for your interest so you have a capital gain or loss. if a loss it can be used to offset capital gains from other sources such as stock sales. in any year you can take a maximum of $3,000 as a net capital loss against other income. if the net capital losses for a year exceed that it can be carried forward.
