You're screwed (sorry).
You've been making excess payments for years that you didn't owe, and there's no way to get that money back.
If you stopped living in the home before 2016, you were supposed to file a form 5405 in the year you sold or moved out. Your credit balance would have been immediately due in full, or forgiven, or a partial payment was owed, depending on the circumstances. That would have ended your responsibility for repayment and you owe nothing after that.
So, you should have filed form 5405 in 2009. If you made a gain on the sale, you would have owed full repayment (up to the amount of the gain). If you had a loss on the sale, or you were foreclosed, you owed nothing, and filing the form would have canceled all remaining payments.
The only exception is if you were forced to leave the home due to fire or condemnation ("involuntary conversion"). If you had a loss on the involuntary conversion, you can file form 5405 and the remaining credit balance is forgiven. If you moved into a replacement home and broke even or had a gain, you can continue to make installment payments for the rest of the 15 years. If this is what happened, answer "yes" you are still living in the home, since you are living in the replacement home.
You will need to file an amended tax return for 2009 that includes form 5405, to report the circumstances and determine what you owe. Turbotax is no longer supported for 2009, you will need to do the amended return by hand using the 2009 versions of the tax forms and instructions downloaded from the IRS web site, or see a tax professional.
Then for 2016, you owe no payment, but the IRS thinks you do, so you will need to print your 2016 return and mail it in.
You can also file amended returns for 2014 and 2015 to get back the payments you made in those years. Unfortunately it is too late to file amended returns to get refunds for 2013 or before, so that money is just gone.
Amend https://ttlc.intuit.com/replies/3288565
