The email you received should have included the reason why you were not approved. Your approval is based on the size of your federal refund and your tax information, along with other factors. You may not receive the Refund Advance if one of these factors doesn’t meet the qualifying standards of the lender.
Please click the TurboTax help link, listed below, to learn more about the Refund Advance process. https://ttlc.intuit.com/community/refunds/help/about-the-refund-advance-application-process/00/25557