Your spouse can't be your dependent. Please clarify if you filed Married Filing Separately (MFS).
Form 8379 can be filed separately if the injured spouse finds out after the IRS seizes the refund.
For additional information, refer to the TurboTax article What is IRS Form 8379: Injured Spouse Allocation?
If you would like to file Form 8379 separately, refer to Form 8379-Injured Spouse and Form 8379 Instructions.
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