e-file rejected as dependent child filed w/o indicating that they will be claimed as dependent. What next?

[hysteresis]

Greetings --

My e-file got rejected w/ the message:

This return has been rejected by the IRS because a dependent on this tax return has filed their own tax return without indicating they would be claimed as a dependent. The dependent's SSN cannot be used to on two separate tax returns, without that indication.

I've asked my child (fun time student living w/ me and thus qualifying as a dependent) to fix his return (he e-filed from TurboTax about a month before me). From here on could I still e-file from TurboTax or do I have have to file by mail?

Thank you,

-DM

[DoninGA]

You will have to file by mail and include them as your dependent as the IRS will not accept another e-filed return with their SS number even after they have amended their tax return.

[hysteresis]

I appreciate the prompt answer, thank you!

-DM