If you receive your refund before his return reaches the IRS, then it probably won't stop yours.
BUT, when the IRS receives the father's return with the child on it, the
IRS will investigate and then decide who can claim the child based on IRS qualifying guidelines.
Then, the parent who does not qualify to claim the child will have their return recalculated by the IRS and refund/amount due may be different.
From
<https://ttlc.intuit.com/questions/4224949-my-sons-social-security-number-has-been-claimed-by-his-fat...>
