I am married and my husband owes back child support and we file together and i keep my part of the return

[KatherineC]

If you are asking what you can do to have your share of your refund protected; you can file the Injured Spouse Allocation on Form 8379.

Please look at the link below for information on Injured Spouses and Form 8379.

https://turbotax.intuit.com/tax-tools/tax-tips/IRS-Tax-Forms/What-is-IRS-Form-8379--Injured-Spouse-A... 

You can access the Injured Spouse Allocation by clicking on Federal Taxes, Other Tax Situation, Miscellaneous Forms and finally click the button beside "Report an Injured or Innocent Spouse Claim". 

Pay close attention to the questions - you need to answer the Injured Spouse questions, not the Innocent Spouse.