Your 2019 earned income can be found on your form 1040 between lines 1-11.
The IRS defines earned income as:
- Taxable income you earned as an employee, such as wages, salaries, commissions, and tips
- Profits from operating your business or farm
- Long-term disability pay, if received before the minimum retirement age
- Union strike benefits
Please see this TurboTax FAQ, for more information, What is earned income?