your basis is any capital you contributed + any undistributed income. income is not distributed because it is reported on reported on your return. it only is distributed when the S-Corp makes a distribution of cash or property to you.
look at the S-corp's schedule L at the beginning of the year. What's the total line 19 plus the total for lines 22 through 26. that's likely your tax basis at the beginning of the year. Any distributions in 2022 reducing your basis would appear on the k-1 line 16 and would also show in the M-2 column a line 7
