For your federal income tax, it doesn't matter if you are a sole proprietorship or a single member LLC. You file as a disregarded entity, which means you report your business income and expenses on a schedule C that is filed as part of your personal tax return. If filing your taxes with Turbotax Online, you would need the Self-Employed version, which is currently $90 federal plus $50 state. You can upgrade to Turbotax Live, where you get online chat help from a CPA, or Full Service, which is what it says.
https://turbotax.intuit.com/personal-taxes/online/
