Unfortunately, there isn't much you can do at this point. There are many reasons why your return may be delayed by the IRS review process. This article lists a few: Top Reasons Your Tax Refund Could Be Delayed.
While you wait, check over your return to see if you find errors or missing information that could explain the delay. Also, be sure you save a copy of your return. Follow these instructions: How do I save my TurboTax Online return as a PDF? If you used TurboTax for Desktop, go to File >> Print and choose "Tax Return, all calculation worksheets."