When you log in to your TurboTax Online account, you can check your filing status on the welcome screen. If you have completed and submitted a return to the IRS (and/or your state), this screen will show if the return(s) has been accepted or rejected. If the return is rejected by the IRS TurboTax will send you an email alerting you to log in to your account and correct the return.
If you have a calculation error on the return then you may not see a status for your return when you log in. In that case, you will need to select the "Take me to my return" button when you log in and then select "Review" on the left menu bar to review and correct errors on the return, then you can finish and file.
