I have a client that died in late October and her family is from another country.  I am filing the lady's last year tax return for the family. Wondering about the estate tax form before 4/15 hits.  Some one mentioned to them that they could do like from 10/20/24  to 10/19/25 instead of  the regular due date of 4/15.  Is that so? if so was there a place on any form they were to state that?  I just don't want them late for filing and could apply for an extension if they are wrong.  I told them maybe it's on the form when the attorney applied for the federal tax id... and maybe not.. not sure.  Please help if any one knows the real answer.