After selecting "e-file" twice and waiting for a while - there was no response and only a blank "page". Am I doing something wrong?

[LeticiaF1]

You aren't doing anything wrong.  Sometimes you just need to try troubleshooting your web browser, turn off any pop-up blockers, use a different web browser, delete your browser cookies.

Sometimes when you aren't able to e-file it's due to one or more of the forms on your tax return not being ready yet. You can visit the following TurboTax help article:

When will my individual tax forms be available in TurboTax?