You mark on the 1310 that there a court appointed representative and attach the certificate....oh wait, I guess not, it says only if its a 1040X or a 843.
So you mark box C then Yes to 2a and Yes to 3.
There are programmers, and then there are people who can read IRS instructions. They're often not the same people. In the time it takes to fuss with the system, you can print out a paper return and get it in the mail. Although I feel sorry for the Service Center employees who are working in sweatshop conditions, and have to open and process the mail.
Checking Box C is not a good choice. If there is a PR, there should be an estate bank account for deposit of checks made out to the decedent.
Frustrating that the programmers can't put in a box to check or something so that program doesn't default to Form 1310 when it isn't needed. Return and refund is processed so much quicker when it can be electronically filed rather than mailed. Ridiculous that an estate is held up from being closed and PR discharged because you are waiting for a refund check that can take many weeks or months to receive because you had to mail in the return. ProSeries needs to get this fixed!