From what i have read in the forum is , as long as you have paid your taxes or have a payment plan in effect then you should be fine. You may want to take proof of that when you go in for interview.
Hope this helps !!
Couple of times there was error in my Tax filing , IRS sent me the notice and paid the due on time. Once my online payment did'nt go thru and IRS sent a notice and paid ontime. Will these be a problem in N400 interview. Please advice