Reject Code: IL1065-2600-4 | Category: Incorrect Data | Severity: Error
FormIL1065 Step 2 Line 1 must equal IRS1065 Schedule K Line 1.
Generally this reject occurs in the Illinois partnership return when a change has been made on the federal return but the Illinois return hasn't updated for it.
To update the Illinois return, simply open it. You can then exit the return completely and retransmit the Illinois return "state only".