Deductions & credits

Hello, I was trying to complete and submit my taxes today in order to save $30 as advertised, however this error is blocking me from finishing my work.

 

I read through the steps to attempt to fix the error, however I only have one mortgage, no refinancing here, so I'm not sure it applies to my situation.

 

What else can I do in order to submit my tax payment today and avoid the extra $30?