Is turbo tax holding up my stimulus check

No - TurboTax is not holding up your stimulus check.  To check on your second stimulus payment, please follow these steps:

1. Check the IRS Get My Payment tool. The tool should tell you where your stimulus payment was
   deposited or mailed. The IRS has indicated there’s nothing you can do to change where they send
   your payment.
2. If your payment was delivered to a prepaid Turbo® Visa® Debit Card and you no longer have it, we’ll
   help you  get a replacement card at no cost.  Just click on this link:  Get a replacement card 
3. If you paid for TurboTax with your refund last year, we have given the IRS your correct account
   information and they are working to send your payment within days.
4. If you were entitled to a stimulus payment but did not receive one, and you didn’t pay for TurboTax
   with your refund last year, you may need to claim the Recovery Rebate Credit on your 2020 taxes to get your money.

For more information, please see this article:   Why Haven’t I Received My Second Stimulus Check?