After you file

I doubt that the income reported by Schwab is the same as on the K-1 you received since it doesn't get this info.  but to make sure what kind of income is being reported for this entity by Schwab? 

reporting of income in part III on lines 1, 2, and 3 of the k-1 require a separate k-1 for each of these lines with a number other than zeo. most other lines can be entered on the 1st k-1. but maybe not all.  some lines on the k-1 may need to be reported on the separate k-1. there should be info included with the k-1 to guide you.   for example line 17 on the k-1 would need to be entered on the k-1 it relates to.  QBI info in box 20 would also need to be entered on the related k-1.  These are not the only lines just an example.