where put business deductions

You can enter 1099NEC or cash Self Employment Income into Online Deluxe  but if you have any expenses you will have to upgrade to the Premium version.

Where to enter self employment  expenses

https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/enter-self-employment-business-expenses-like-home/L1k6HJY4A_US_en_US

Business income and deductions are reported on Schedule C.  

Here is how to do this in TurboTax Online:

• Log back in, navigate to Federal > Wages & Income > Self-employment income and expenses > Add/Edit
• Find your business and choose "Edit"
• Now, adjust your income or expenses as needed

If you are using Desktop:

• Navigate to Federal Taxes > Wages & Income > Business Items > Businesses Income and Expenses (Sch C) > Update
• Find your business and choose "Edit"
• Now, adjust your income or expenses as needed