If you are married filing separately, and your spouse has already filed, you may get a message that another return has been filed with your spouse's SSN. It's odd that you would get the message that he's been included as a dependent on someone else's return. Double check your e-file status using the steps in the following TurboTax Help article: How do I check my e-file status? - TurboTax
Once you receive confirmation that your federal return has been accepted by the IRS, there is nothing you need to do. You'll be able to start tracking your refund at the IRS Where's My Refund? site.
@Amyleasm
