After you file

Yes, he should file his landscaper income as self employment. A document is not required and all income received for services must be included on his tax return.

He should have a record of his receipts, customers, etc., to show his business activity.  A separate bank account is very helpful and recommended to show both income and expenses related to the business.

Schedule C is supported in TurboTax Self-Employed (both online and in the mobile app) and in all personal 1040 versions of the TurboTax CD/Download software.

To set up your business:

1. Open or continue your return.
2. Search for schedule c and click the Jump to link in the search results.
3. Answer Yes to Did you have any self-employment income or expenses?
   • If you've already entered self-employment work and need to enter more, select Add another line of work.
4. Follow the onscreen instructions.

See the image for the selection of cash income. 

To record the stimulus section of the tax return use the steps below.

IRS Recovery Rebate Credit

• In TurboTax Online once your return is open, select Wages & Income (to enter the tax return).
• Select Federal Review at the top of the page > Continue to answer the questions for Let's make sure you got the right stimulus amount
• TurboTax will then include any stimulus amount due on your 1040 form - either added to your refund or reduce the amount due.
• See the image below.