The method zoltanb describes will work.
Alternatively, enter it in the 1099-NEC section. At the screen titled "Does one of these uncommon situations apply?", select "This is not money earned as an employee or self employed individual, it is from a sporadic activity......"
That will automatically put it on line 8z of Schedule 1 and identify it as "non-employee compensation from 1099-NEC"
You say this was "student loans forgiveness or repayment by a third party". It kinda depends on your relationship to the third party. If the payer was your employer, it should be treated differently.
