cannot add Form 8615

[PCKL]

I cannot add Form 8615 to my child's return. When I open one in View/Forms, it is disabled with this "Child Age 18 to 23 Smart Worksheet" box:

The "No" box is checked and I cannot change it to "Yes" even though (as far as I can tell) all the conditions are met:

1. Child is full-time student between age 19 and 23.
2. Unearned income (interest + non-qualified dividend) more than $2300.
3. Earned income under $1000 (thus certainly less than half of their support).

What may I be missing? Is there TT worksheet where I can check how it comes to the "No"' conclusion?

[TurboTaxSusan]

This is the support site for the Canadian TurboTax. For assistance with U.S. taxes and U.S. versions of TurboTax, please visit the website for TurboTax USA.