How do I enter my expenses when filing on turbotax?

What kind of expenses are you referring to?

As someone who is self-employed such as equipment I purchased, gas, etc.

You can see the form and breakdowns here, About Schedule C (Form 1040), Profit or Loss from Business  IRS. The best thing you can do is learn, see Small Business and Self-Employed Tax Center for the answer to every question you will ever have.

 

It includes these links as well:

 

• Publication 535, Business Expenses
• Publication 583, Starting a Business and Keeping Records
• Self-Employment Taxes
• Form 1040-ES, Estimated Tax for Individuals
• Hire your kids

Also, from Turbo Tax:

:Is my business an SSTB?

What can I expense or depreciate with the business safe harbor election?