Hello!
It would depend on how his side gig business is structured. If he is a sole proprietor or single member LLC you would include his income and deduct hisexpenses on your married filing joint return. It would be reported on a schedule C and included in your personal return. You would need Turbotax Premium if you are preparing it online or Turbotax Home and Business if you are using the downloaded version.
If he is structured as a Partnership , S Corp or C Corp he would file a separate business tax return using Turbotax Business.
