Client set up a revocable trust for wife as beneficiary. He died 3 years ago. Revocable trust used wife's SSN and had no income. Now (in 2022) their house will be sold for $600K. Lawyer does not know (!) whose SSN or EIN will be on 1099-S document. Should I get an EIN number for the (now irrevocable) trust just to be on safe side in case I have to file a 1041?