Yes, you can access the form in Turbotax.
When filing jointly, the Injured Spouse Allocation (Form 8379) lets you recover your portion of your refund that was kept by the IRS to pay your spouse's debt (back taxes, back child support, etc.). Form 8379 can be filed right with your taxes. No special signature is needed.
You must file jointly to use this form. Also, filing an 8379 will delay your federal refund by up to 14 weeks.
To file this form in TurboTax:
Note: Pay close attention to the screens, as some of them apply to innocent spouse relief, which is something else. Leave those questions blank if you only want to claim injured spouse relief.