Partnership e-file reject because missing schedule K, but where is schedule K

My partner ship e-file rejected with the message below.  Where can I find schedule K?  I can't even find schedule K online.

Reject reason:

"Complete Schedule which is a summary schedule of all the partners' income, credits, deductions, etc. before completing Schedule K-1. Items reported on Schedule K-1 should come from Schedule K. Remove items on Schedule K-1 that is not reported on Schedule K."