Because the IRS hasn't released the form 8839. If you have a recently adopted child, you need to wait.
However, I do not have a recent adoption. Tried multiple times to delete the form, logged out, deleted cookies, allowed customer service to view my screen, repeated all the steps with 3 different CSRs and finally logged in on my phone, successfully deleted form 8839 and the adoption tax credit worksheet and submitted my taxes. I hope this helps someone else!
