After you file

There is no way to change it, at least not to my knowledge.  It does not know that you took your return to the mailbox.  You also cannot cancel an e-file and mail  

To check the status of your federal refund, use the IRS “Where’s My Refund?” tool on the IRS.gov website. You’ll need to provide your filing status, Social Security number and exact refund amount as it appears on your return.