Fill out Form 8379?
INJURED SPOUSE
https://ttlc.intuit.com/turbotax-support/en-us/help-article/spouse-partner/file-form-8379-injured-spouse-allocation/L3KVDvR02_US_en_US?uid=ltmrgzbp
https://turbotax.intuit.com/tax-tips/marriage/what-is-irs-form-8379-injured-spouse-allocation/L7tsrxCbr
Federal>Other Tax Situations>Other Tax Forms>Miscellaneous Tax Forms will take you to the injured spouse form
Note: Using the injured spouse form delays your refund for at least 14 weeks.