You are right, the QBI form 8995 should be available to e-file on both the Federal and State side.
Federal form availability
State form availability
It's possible that there's an issue with the Schedule E Worksheet (property address): QBI Passive Carryforward. There may be one or more disallowed/suspended loss values on this Form/Worksheet (although this field may be blank). They may not be fully supported by the program, and the return just has to be mailed, unfortunately. Sometimes returns can't be efiled.
