<prompt> Human: I was receiving a stipend working as a fellow for 4 years in a military research institute. I never had any issues with taxes until the last year, when my tax accountant said I paid too much in years before so I didnt owe anything in 2012. In the last 1.5 years, Ive received 6 letters from the IRS and 2 letters from state department of revenue saying I owe them 2100 and 600, respectively. Obviously, I forwarded these onto my tax guy who, again, said he didnt think I owed anything. But 1.5 years later Im still receiving these letters and interest is accruing. Furthermore, I just received a letter from state department saying my refund is being withheld to pay for my debts. My questions are:1 What am I jeopardizing by keeping this in contention? Is this affecting my credit?2 What should I do in this situation? Is my accountant liable?  <response>: I forwarded these onto my tax guy who Is my accountant liable?Your tax guy is not liable for the balance due. But 1.5 years later Im still receiving these letters and interest is accruing.Failure To Pay FTP penalty and interest accrue until the balance due is paid in full, or the assessment is corrected by the Service. What am I jeopardizing by keeping this in contention?Based on the amount you describe above 2,100, you are at risk for enforced collections actions such as a bank or wage levy. Is this affecting my credit?Not yet. The state may have a lower threshold for filing a lien, which may adversely impact your credit. What should I do in this situation?Call the IRS customer service number on your notice, and find out exactly what is happening. In my opinion, you should seek a new tax practitioner, such as a CPA or Enrolled Agent. Provide them with copies of your original returns for the tax years in question and copies of all notices regarding the assessments. 