Your income and expenses are entered on Schedule C. You can include supplies under the supplies category for expenses. If you do not have a 1099-Misc, see steps below.
First, sign in to My
TurboTax
Next, click the orange Take me to my return button
On the white bar at the top, click Federal Taxes
Then, Wages & Income
In the Self-Employment section
(you may need to click Show
more), next to Income and Expenses, click Start (or Revisit)
When asked "Did you have any self-employment
income or expenses?" select Yes
You'll see the screen titled "Tell us the type of
self-employment work you do." Enter your description, then Continue
On the next screen "Let's get income for
[description]" select the button Additional income. Includes 1099-K, check/cash
payments and Continue
The next screen will say "Tell us about
additional income for your [description] work." List descriptions and
amounts on this screen
