Only the bank can answer that question ... and like all rejected loans a letter of denial should come in the mail.
For questions regarding your Refund Advance status, you will need to reach out to Credit Karma. You can contact them by clicking here.
Although TurboTax and Credit Karma are both a part of Intuit, they are separate products. Please see Is Credit Karma a part of TurboTax? for more information.
