<prompt> Human: Hello rpersonalfinanceMy dad passed away Monday and left a bit of a tax mess for my mom. They have not filed any taxes since 2009, leaving 2010 through this year untouched.Luckily it seems he left a drawer of tax documents, organized by year, which hopefully has everything he received from his work and everyone else.Theyre 6 years late so a few more months shouldnt be that big of a deal if it takes a while to get sorted out. They had always finagled it so that money would come to them when they did file, so Im not overly concerned about harsh penalties... But if there are then thats what the life insurance would be for.Whats the best way to clean this up? Would it be to hike down to the nearest HR block to process, or would this be something that might be manageable myself since everything seems to be well organized? If they are taken somewhere to be processed, what kind of fee structure would they work on?Thanks for any help, sorry for my ignorance. Ive never handled more than one return at a time, and never anything late.  <response>: A word-of-mouth reference to find a trusted tax professional CPA or EA in her area would probably go a long way to make this process as smooth as possible.Begin with the documents you have, and start with preparing the 2010 return to determine whether there was a balance due or an overpayment. They had always finagled it so that money would come to them when they did fileAny refunds they may have been eligible to claim for tax years 2010 through 2012 are no longer available for statutory reasons. The 2013 return should be filed no later than the return due date in 2017 to claim their refund. 