If your return was accepted, then only the IRS (and State if any) would know why your return is still showing processing. TurboTax does not get any updates from the IRS or State. You can keep checking the IRS website Where's My Refund for information on the completion of your return & approval of your refund. The IRS website only updates once a day.
If you have a State refund, you can check your State's website for refund information.
