<prompt> Human: EDIT: Okay I told him to get a CPA asap and found out that the state of CA is already garnishing his wages...does he need an attorney for this too?? So the situation as far as I can understand is that he did not file any taxes since 2013. The IRS sent him a letter saying he owes 150k I guess they did a substitute return?. Can he still file himself back to 2013 with deductions, etc to try and get a better number for taxes owed? Is there any recourse to negotiate down the amount owed either in penalties or debt based on ability to pay? I think hes close to going bankrupt in his personal business. If he can file his old taxes, would you recommend using Turbo Tax or other tax software ie, are they capable of filing back taxes? Any other advice on how to handle? Sorry if this isnt the right place to ask...if there is a better subreddit def let me know. Thanks!!  <response>: With this much money on the line, they should go to a CPA. 