I am filling out Injured spouse relief. Part 2 has "Spouse Form 8875" with a checkbox and no other context. what do i do

On the Form 8379, Part II is used for Information About the Joint Return for Which This Form Is Filed

There is no reference to a Form 8875 in Part II

See IRS Form 8379 Injured Spouse Allocation here - https://www.irs.gov/pub/irs-pdf/f8379.pdf

Form 8875 is a corporate form, but Form 8857 is related to innocent spouse relief. Both innocent spouse relief and injured spouse relief are available to get you out of liability for joint tax debt if eligible, but they're used differently. Are you working on injured spouse (Form 8379) or innocent spouse (Form 8857)? Are you working on this within TurboTax?