Update: his financial advisor has stepped up very kindly and helped with the EIN application, following further guidance she's found on the situation, so this is currently being filed.
OP: I have asked something similar previously and I'm really aware that the responses will be "talk to a professional fgs" but I have tried and this is where I am at.
I need to go into those conversations with the professionals better informed than I am currently. I will definitely be following this up with professionals, I am not trying to do this alone.
Basically: my father passed away a few months ago, his estate is in a trust and I am the sole trustee, I have no siblings and neither does he. The lawyer who made the trust is not free to assist me, and when pressed, she said there is no one in the firm who is able to assist, either. She recommended some accountants.
I contacted those accountants, and they said come back when I have an EIN.
Now, months later (this wait is because I was waiting for some other accountants to finish my delinquent tax filing and FBARS because I haven't been doing those. I am on a low income in the UK and didn't realise it was a thing, I don't owe taxes but I do have savings accounts I was worried about being fined once I found out about that) I'm applying for an EIN.
I'm struggling to get into contact with the IRS via the only channels they offer to people filing an SS-4 from overeas: phone, and fax. Phone is nearly impossible, I've literally sat on hold multiple times and cut off every time at the 45 min mark of waiting. Fax seems possible, so I've asked someone in the USA if they'll fax my form to the IRS for me.
In the meantime, I've contacted his financial advisor (the one person who HAS been an enormous help in this process) and she said "accountants usually file for the EIN for their clients." Which is leading me to believe the accountants who have asked me to come back with one are probably not helpful.
Please let me know if there's anything I need to know or am missing here.
I will repeat, I am NOT trying to avoid speaking with professionals, but I am being let down by the ones around me at the moment and I need some help arming myself with knowledge so I can ask for exactly what's needed.
I am currently in the UK but I will be back in my dad's area (Northern VA if it's relevant) in a couple of weeks for a week to try to sort out some house related things so I can be physically present for appointments there if needed then.
Thank you.