Yes. The day you were "able" to receive income is the day your business started.
Some expenses prior to your business start day can be considered Start Up costs. Please see this link IRS Business
Start Up Costs
You will file a Schedule C as a self-employed person. The Schedule C will flow onto your individual
income tax return (Form 1040) and be netted with other personal income and
expenses.
How to get to that area
:
While inside
the software and working on your return, type Schedule C in
the Search at the top of the screen (you may see a magnifying glass there).
There will be a popup that says Jump to Schedule C.
Select that to get to the general area.
When you set up your business, you can use your own name,
address, and social security number.
Follow through all the areas in the Business section of the
TurboTax software and it will provide you with a lot of assistance. You'll
notice blue links that have more information and details about the particular
sections that will be extremely helpful.
Also, this link may be helpful to you IRS Small
Business Help Center .