If you transferred the home in 2018 to your ex-spouse due to divorce, by indicating this to the IRS on Form 5405, you will no longer be liable to pay back any of the First Time Home Buyer Credit:
Please follow these instructions to complete Section I of Form 5405:
Hello,
The above workflow does not work. Clicking "No, our situation changed (it's not our main home) requires a 2018 date. My wife and I are now renting the house that we used the first time homebuyer credit for, so we have not sold it, but we stopped using it as our main residence prior to 2018 (2013). Please advise.
Oh my ... you have big troubles if you converted it to a rental back in 2013 !!! That was the year you were to report the change in use AND pay the remainder of the credit back in total.
So have you just been paying back the credit every tax year since 2013 ??? You may really need to seek local professional assistance to get the 2013 return amended especially if you have been paying back the credit every year since.