<prompt> Human: Im trying to square away as much of his financial stuff as I can for my parents. We havent received a death certificate yet so Im just trying to do what I can until we receive that. Im confident Ill be able to guess his password on Turbotax. Should I log onto his account and just do them to get it done? Alert the IRS hes passed and let them figure it out? Any advice would be greatly appreciated. Thank you Edit: Thank you all for the responses and ideas. Im not sure what we are gonna do about it for now but i am gonna wait till we know for sure what to do. Thank you again.  <response>: No one can file his taxes without having authority to do so. You cant file his taxes for him because at some point, youll have to e-sign and certify that you are him. You need to figure out if a potential refund is worth opening a probate and getting the authority to do so. You may want to consult a probate attorney to weigh the pros and cons. 