When filing ACA returns using Quarterly Express Plus, create your 1095's first before creating your 1094's.  Right click on the Company Name in the left pane, choose Information returns and select either your 1095-B or 1095-C for the first employee.   Please note that if you are importing 1095 data, you would create your 1094 in the software first and import the 1095 data into the 1094.