<prompt> Human: Hello Reddit! Long time lurker here. Hoping to get some advice before i call my accountant this afternoon. Basically I pad her 180hr 6 months ago to help me project my taxes this year. I have incentive stock optoins ISOs which require her skills. She gave me a prelim projection 6 months ago. Then an accurate projection last month after i received and sent her all my final and official paper work and docs.Then I get her totals for a third time now and they are 7,000 more than her refined projections last month. WTF?!She said she made an error and didnt apply the iso rules to my state taxes. Opps. Sorry.Im pretty pissed off really. I was prepared for maybe 1,000 or 2,000 off, but 7,000! thats a lot of money. And i paid her specifically for ISO HELP. and she fucked it up. So my questions are-Is she, or her firm liable for this this? If not, then why did i pay her? -in my mind, i paid for a service, but i got a flawed service. I also look at it like i paid for an insurance policy.- do i have any grounds for argument here?- do i have the right to a refund? i paid for a service that i did not get. - She still has billable hours into this project that i havent paid for. do i still have to pay her?Edit: I understand that i am still responsible for the taxes owed. Edit 2: Posted in legal Any info is much appreciated!! thanks!!  <response>: I doubt you can go after her for your tax liability. However, for 180hr she should not be making such mistakes. You could possibly try to recover any fees you paid her for this project via small claims court. 