While I am not sure what directions you have already followed, the ones below should work (let me know if you still have trouble).
You can enter a second self employment line of work by following the instructions below -
- Log into your account and click Take Me To My Return (you must click this before searching if you are not already in your account)
- Type “Schedule C" in the search box, top right of your screen, then click the magnifying glass
- Click the "jump to schedule c" link in the search results.
- You will arrive at the Your Business summary page where you can add a business
- You should see an add button underneath your business that is already there to add a second business
- Follow the onscreen instructions to enter your new business profile and business income and expenses
