If you did not prepare a complete return, then it means your extension is going to be transmitted.
Not sure why that is stating transmit returns, the following FAQ might help you.
How do I file an IRS extension (Form 4868) in TurboTax Online?
I don't know but maybe file an extension outside of your account by using TurboTax Easy Extension.
https://turbotax.intuit.com/irs-tax-extensions/
---------------------------
Since we cannot get into your account or see any information, if you are still having problems you might want to contact TurboTax Support.
https://support.turbotax.intuit.com/contact/
If you did not prepare a complete return, then it means your extension is going to be transmitted.
That is my hesitation.
My return is 90% done.
I want TT to just file for an extension.
The top of the page I worked up to says "Turbotax extension consent agreement" but the button says "Transmit my return now". So the page seems inconsistent.
The button should say "Transmit my extension now"
If I click it, I'm not sure what it would do.
Not sure why that is stating transmit returns, the following FAQ might help you.
How do I file an IRS extension (Form 4868) in TurboTax Online?
I don't know but maybe file an extension outside of your account by using TurboTax Easy Extension.
https://turbotax.intuit.com/irs-tax-extensions/
---------------------------
Since we cannot get into your account or see any information, if you are still having problems you might want to contact TurboTax Support.
https://support.turbotax.intuit.com/contact/