I entered my husband's business info,but it's not asking me for MY business info, even though we are both self-employed and it asks every other year. Where do enter this?

Not sure how to add another business schedule C in the Online version but try this…
Click on Federal
Then scroll down to Self Employment and click on Revisit
Then, you should see a link on the screen (under the first business) that says Add Another Business.

You can just type Schedule C into the search bar at the top of your return and it should give you a JUMP TO link to go directly to it.