2017 taxes

So I had to file for an extension to finish these taxes. After the extension, I determined that I needed to set up a payment plan with the IRS to pay off my taxes. I Requested from the IRS to see what my remaining balance was recently, and they have no documentation or idea why I'm making the payments. I thought I couldn't file my taxes until they were paid in full. How can I get my 2017 taxes filed now? Everything has been completed this entire time, just not submitted apparently.