My father started the business, and I was helping him occasionally.  After his death I decided to continue but I was not aware about the EFIN requirement until last December.  I already applied for my own number, but I am waiting for them to get to my application and then send my information to the FBI etc.

Funny thing (I am being sarcastic here) I contacted IRS and explained my situation and they told me that they will re-activate my father's EFIN number for 45 days ONLY while I get my own.  ProSeries could not accept that because they need my father's EFIN summary application which he did back in 2016 and I don't have that information right now.  So, IRS re-activated the number, but I can't e-file.  I was told by tech support that even if I had his summary application it would not work because it will create an error message within the software.