On this screen use either BAI format parameters, or simply keep the default values:
"Sender"
Transmitting bank's ABA number or DUNS number.
"Receiver"
Receiving ABA number from vendor
"Originator"
Originating bank's ABA number.
"Ultimate Receiver"
Optional. Final receiver of the file.
"File Sequence Number"
The first file of the day must be 1; every successive file is incremented by 1