I was 15 when my father passed away and I just seen that you could file a deceased persons taxes when I discovered this year he had a unclaimed insurance policy. I was too young to know back then and hopefully my mom didn't even know to do it because she would've taken if she didn't back then. He did not have a will but I was the only living heir and everything went to me. Is is possible to file his last taxes? He worked up until February of 2000 and I believe he was too sick to file 1999 taxes. Is there a way to check and can I file a tax return from 1999, 15 years ago?