Unless you're planning to file using the "Married Filing Separately" filing status, you won't.
You'll enter your husband's income under the Wages portion of the TurboTax Interview. See the TurboTax FAQ below for instructions.
https://ttlc.intuit.com/replies/5723068
Then, to enter your self-employed income (maybe you got a 1099-MISC?), see the instructions below.
https://ttlc.intuit.com/replies/4770594
Also, see this FAQ for self-employed income:
https://ttlc.intuit.com/replies/3302122
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***