If your son's last name is spelled wrong on your tax returns that you have already submitted, the IRS may Reject your return. The IRS matches the first four letters of the last name with the Social Security Number; therefore, your return will only reject if the first four letters of your son's last name are incorrect.
If you receive an email from TurboTax that your return has been rejected, you will simply need to login to your return, correct the spelling of your son's last name, and then resubmit your returns.
You can also track your status here: https://turbotax.intuit.com/tax-tools/wheres-my-refund/.
[Edited 01.28.2019|10:54 AM]
