Have a Tax Question? Ask a Tax Expert
Yes you can request an installment agreement online if you have filed all returns due and owe less than $50,000. You can use this link: http://goo.gl/7PZhCc to use the online form or complete a paper request.
Have you received notices regarding the return in question? What address did I you use on your last tax return? The IRS would be using that address to send the notices.
You may want to request your IRS account and return transcripts for the years in question to see why the IRS says you owe money. You can request the transcripts here: http://goo.gl/apokqw
Let me know if I can clarify anything or answer any additional questions. Thanks, Jonathan