The simplest thing to do is just wait. After a few months the IRS will notice the duplicate payment and send you a refund, without your having to do anything.

Are you sure?  You sure it isn't the credit card charge for the Turbo Tax fees? If your efile was Rejected then the payment information didn't go to the IRS at all.

Maybe you efile was Accepted?  You can double check your efile status here     

https://turbotax.intuit.com/tax-tools/efile-status-lookup/   

When you efile you get back 2 emails.  The first email only confirms the transmission.  The second email says if the IRS (or state) Accepted or Rejected your efile.

When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc.  What does it say?

This just happened to me as well. My credit card was charged but my return was rejected. I do not know what to do as I have spoken to my credit cart company and they assured me that card was charged for the amount. I printed and mailed my return but I have no way to see where my money went.

Please follow the instructions here to contact us by phone so we can look into this. We are unable to view your return or account here in this public forum. @Finaddict32244

P.S. don't bother calling the turbo tax people.  They will be no help.  Just know that the transaction will be cancelled in a day or so.