We are trying to enter our Boat, second home, into TurboTax, like we have for the past few years but, it will not let us enter amount and select box 2a (No 1098 received)

[KrisD]

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