To e-file that tax return you had to complete the File section and click on the large Orange button labeled "Transmit my returns now".
Why would you do that if you knew the tax return was not complete?
You were asked if you filed a 2019 tax return and based on your answer you either entered the 2019 AGI or a 0 was entered for the 2019 AGI. That is how you file electronically based on IRS procedures. If you did not file a 2019 tax return then you also had to enter a 5 digit self-selected PIN to be used for future tax return.
A tax return with no income can be e-filed if there is a tax credit on the tax return. If you completed the Stimulus questions in Federal Review and were due a stimulus payment that amount was entered on the Federal tax return, Form 1040 Line 30 as a tax credit.
The tax return will remain as Pending until the IRS starts accepting or rejecting 2020 tax returns on February 12, 2021.
After completing the File section and e-filing your tax return you will receive two emails from TurboTax. The first email when your tax return was transmitted and the second email when the tax return has either been accepted or rejected.
After the tax return has been Accepted by the IRS (meaning only that they received the return) it will be in the Processing mode until the tax refund has been Approved and then an Issue Date will be available on the IRS website.
See this IRS website for federal tax refund FAQ's - https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions
