What is form 8615 and why is it blocking me from filing?

[Critter]

Form 8615 is used to figure your child's tax on unearned income. The form is only required to be included on your return if all of the conditions below are met: You had more than $2,200 of unearned income. You are required to file a tax return.

https://www.irs.gov/pub/irs-pdf/f8615.pdf

[macuser_22]

And you cannot file yet with form 8615 since the form is being revised by the IRS and will not be ready for filing until Feb 22 (estimated).

https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html