My tax summary indicates a sizeable capital gain but I can't identify the source. It isn't related to a 1099-B and I haven't disposed of any interest in a partnership?

[Rlwaldm]

My K-1 has no amount in Boxes 8-10. Box 11 only includes Codes S and ZZ. For Box 20 Code ZZ, there is no amount provided in the supplemental notes.

[Mike9241]

box 11 code s  = non-portfolio capital gain/loss