I got the email and set up account 10 minutes after submitting my return, along with temporary card info. No other form of communication regarding the advance though.
This Turbo Tax FAQ will provide more information. Click on Why haven't I received my Refund Advance after 1 hour? About receiving your Refund Advance https://ttlc.intuit.com/replies/7066857
Your return has to be accepted by the IRS first. Once accepted, you may need to check your junk or spam mail folder if the email does not arrive in your inbox. You should receive your temporary card information by email and you will have to set up your account online. You can expect to receive a couple of emails during this process to get your account set up. Forty-eight hours after your return is accepted, your advance money will be available on the virtual card. The temporary card info will work for 15 days or until you activate your physical Turbo Card, which will arrive within 5 to 10 business days of IRS acceptance and loan approval.
For more information, please see the TurboTax FAQ below:
https://ttlc.intuit.com/community/refunds/help/about-receiving-your-refund-advance/00/27510
You can check the IRS website for up to date information on your refund at irs.gov/refunds.
The below link has all updated information about the advance loan.