Why am I filing Self Employment info for a 1099-NEC for part time labor?

Your spouse has self-employment income from the part-time job.  His friend did not withhold Social Security, Medicare, or federal or state tax, so your spouse has to pay self-employment tax.

https://ttlc.intuit.com/questions/2926899-how-does-my-side-job-affect-my-taxes

https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/26653

https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922

https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax

https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c

https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct

https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs

https://turbotax.intuit.com/tax-tools/calculators/self-employed/

Based on your entries, TurboTax considers your spouse to be self-employed.  It does not matter whether your spouse worked part-time or full-time.  However, whether some is self-employed is a question of fact.  The IRS defines a self-employed person as:

"If you weren't an employee of the payer, where you report the income depends on whether your activity is a trade or business. You're in a self-employed trade or business if your primary purpose is to make a profit and your activity is regular and continuous." 

The following IRS link will provide additional information that may help you decide whether your spouse is self-employed.

1099 Misc, Independent Contractors and Self Employed

If you need to report this income as self-employment income, then from Wages & Income, scroll down to Self-Employment (if you are using TurboTax CD/download, then scroll down to Business Items and select Business Income and Expenses (Sch C)).  Enter your information on the screens as appropriate. 

If your spouse believes that the work performed was  not part of a business, then your spouse would report the income as Other Income.  

Here are the steps to follow to report the income as other income.

1. To enter other income in TurboTax online, click on Wages & Income, scroll down the page to Less common income, click on the drop-down arrow and select Miscellaneous Income.  
2. From the list select Other reportable income and respond to the questions on the screens that follow.   
3. If you are using TurboTax CD/download, the process is similar.  After selecting the Personal tab, then Personal Income tab scroll down the screen to Less Common Income and select Miscellaneous Income.  Enter your information. 

While your spouse received a 1099-NEC, you may see references in the above screens to 1099-Misc.  Just ignore those references and report your 1099-NEC as described above.  Your spouse's 1099-NEC income will appear on Schedule 1 to Form 1040 and also on Form 1040, line 8 as other income.

@shereesather486-