You can report the income as if you received cash.  

To report cash as a self-employment income, please follow these steps:

In TurboTax Deluxe online edition, 

1.  Sign into your account and select Take me to my return

2.  At the right upper corner, in the search box, type in schedule C and Enter 

3.  Select Jump to schedule C 

4.  On screen, Did you have any self-employment income or expenses?  Answer Yes, continue through step-by-step interview questions about your business

5.  Follow prompts.  On the screen,  Let's get any additional income for Direct sales, select Additional Income to enter information.

Thank you for the info.  What if you don't receive a Schedule C, 1099-MISC or 1099-NEC?

You do not need to receive a Form 1099-MISC or 1099-NEC to report the income on a Schedule C. It can go on Schedule C as "Other self-employed income, includes 1099-K, cash, and checks"

You do not even need to use a Schedule C to report the income (unless you want to report expenses for this income). You can report it as "Other reportable income"

• Type "other reportable income" in the search window (or in the Search Topic window for desktop versions) 

• Click on "jump to other reportable income"  (or "other reportable income" in the Search Topic results) 

• Answer "No" to "Did you receive any other wages?" 

• Select "Other reportable income" from the Miscellaneous income list 

• Select "Add another Income item"  on the Other Miscellaneous Income Summary screen 

• Enter a Description and amount,  then click on Continue 

The amount will be reported on line 8 of Schedule 1 (Form 1040).