Get your taxes done using TurboTax

did you link the 1099-NEC to a schedule C?  that has to occur (you can just blow through the Schedule C and click there are no expenses)

 

I would suspect that the federal tax is the self employment tax of 15.3% of the $1200.  That is in effect the social security and Medicare tax that would have been forwarded to the IRS had he been a W-2 employee,