<prompt> Human: I just got off the phone with my parents, because I recently moved across the country. The IRS sent some packet to an old address. Waiting to have the actual forms emailed to me but Im freaking out. What could I have filed wrong? Apparently there is a form I can fill out to dispute it. Im curious if anyone else has had this happen to them. Ill update it with more info when I get it.  <response>: Im assuming the notice you received was a CP 2000 for tax year 2013 or 2014. Your reply to the CP 2000 falls into one of three categories:Agreed: The IRS Very Old Computer VOC is 100 correct and you agree with all of the proposed changes. If this is the case, you should respond to the notice and pay the amount due, or pay the largest amount you can afford, by the notice due date. You can generally request a payment plan for any part of the balance due you cant pay in full. If the balance due is assessed before you file your 2015 return, any refund you claim will be offset to the balance due.Disagreed: The VOC is 100 wrong, you owes no additional tax, and you can prove why by responding with written substantiation on or before the due date on the notice.Partially Agreed: Part of the proposed assessment is correct, but its less than what VOC calculates on the notice. You can prove why by responding with written substantiation and you pay the correct tax amount with your response if possible. If the Service agrees with your response, you will receive a bill for the revised interest due.If you have any questions about the CP 2000, the math on the CP 2000, or what to submit in response, you should call the toll-free number on the notice. If you understand the notice, you determine the notice is 100 correct or you cant substantiate the Partially Agreed response, but you need a payment arrangement, you can call 1-800-829-0922 M - F 7am - 7pm and speak with a representative. They will verify your identity, research the tax account, and provide payment plan options. You should still submit the appropriate written response to the notice. 