OK thanks.
Regarding Cost, I looked through the K-1's from 2018-2020. None of them list any Ordinary business income (loss) - Part III #1.
However, there is a section L under Part II (Information About the Partner) that lists the 'Partner's capital account analysis'.
On each of the K-1's, there is an amount for 'Current year increase', and it shows an amount for 'Ending capital account'. It also selects "Tax basis". Each year, the 'Ending capital account' has increased by a small amount - usually equal to a number in the K-1 under 'Interest Income'.
The final 'Ending Capital account' number on the 2020 K-1 is slightly higher than the amount of our original check.
Is that the number that I should put into the "Cost or other basis"?
