If you mean that your return was rejected, here's some things you can do to fix it: https://ttlc.intuit.com/community/rejections/help/how-do-i-fix-a-rejected-return/00/26136
If you mean that you were not approved for the Refund advance, please see the following information for reasons why that may have been the case: https://ttlc.intuit.com/community/refunds/help/about-the-refund-advance-application-process/00/25557
Click: Why wasn't I approved for a Refund Advance?