I would not recommend paper filing your tax return.
IRS is still processing paper filed 2019 federal returns, among other current projects.
I do not know which IRS link you reviewed, but have found this one:
Please refer to the following link to get information on questions and answers and how much First Time Homebuyer Credit payment needs to be:
IRS First Time Homebuyer Credit Information
You can look up your own information at the above link to see the amount of repayment you are required to make that you can compare with the amount you entered into your return that may need to be changed in order to pass e-file.
