I encountered the same problem on the desktop version. The workaround I found was to: (1) click on the "+ Add Investments" button; (2) on the "Let Us Enter Your Bank and Brokerage Tax Documents" page, click on "Skip Import"; and then (3) on the "OK, let's start with on investment type page," clink on the "Interest" button and then "Continue".
Repeat this process for each separate interest income source/amount that you have.
Good luck!
