After you create the "Electronic File Creation" you need to select "Electronic Filing" Sub Menu "Transmit Forms/Returns". From here you should see the Company and Returns you just created.

Select the (Type) of Forms first then the (Company and Returns)  to create a Transmission File.

Then select the Review Processed Files which are then named with either a W2EF000x.Text for W2's

or IREF000x.DAT for 1099's.

They should be created and located in either Directory on your computer: 

Mine are located on C:\IRS2021\W2EF\W2EF000X.TXT (For W2's) Also may be State files for W2's which it may create in a directory C:\IRs2020\W2EF\WI (for WISCONSIN)

1099'S are created/saved located on C:\IRS2021\1099EF\IREF000x.dat

Once you are either in the Fire site or SSA-BSO site you upload these files for checking and processing.

Have fun