You need to enter it as a interview step by step entry, not by using Form Mode.
Sign into your account and click the blue Take me to my return bar
Click Federal on the left side-bar
Click Deductions & Credits along the top
Scroll down to Your Home and click Show more
Scroll down to Mortgage Interest, Refinancing, and Insurance (Form 1098) click Start or Revisit
Click Add a Lender
Enter (type in) the Lender's name and Continue
On the next screen, click the button for no 1098 and continue
