You have two options to protect your portion of the refund:
You can file separately from your husband (married filing separately); or
You could apply for injured spouse protection. If granted, "injured spouse" prevents a spouse's tax refund from being attached for the debt of the other spouse (for example unpaid taxes, child support, or student loans). The IRS doesn't automatically approve injured spouse applications, but you might want to consider it if 1/2 of your joint refund is more than your refund if you file separately.
Please see the following TurboTax Help article for additional information: How do I file Form 8379, Injured Spouse Allocation?
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