If already filed and the info you provided is for a closed or invalid account, the government will mail you a refund check.
If you haven't filed yet, you can still change your bank account info for direct deposit.
On filed returns in pending status, wait until it's either accepted or rejected before taking action. If rejected, you can update your account and any issues that caused the rejection. Open your return in TurboTax and go through the File section again to update your bank account before re-submitting your return.
Please see below for more details.
https://ttlc.intuit.com/questions/1894389-when-will-i-get-my-irs-tax-refund
https://ttlc.intuit.com/replies/3302459
