I need to offset income earned (not self employment) with adjustments to income (Schedule 1, line 24z) I cannot figure out how to do this on TT. Any ideas?

The correct way to handle to avoid IRS letters in the future would be to put it on the Sch C (where the IRS expects it) and make an expense entry for the same amount to effectively zero out the income.  

Critter-3 is correct that the IRS will presume that 1099-NEC income will be reported on Schedule C.

A negative income entry may be entered on Schedule 1, line 8z by following these steps:

• Down the left side of the screen, click Federal.
• Down the left side of the screen, click Wages & Income.
• Click Show more to the right of Less Common Income.
• To the right of Miscellaneous Income, 1099-A, 1099-C, click the Start / Revisit button.
• To the right of Other reportable income, click the Start / Revisit button.
• At the screen Other Taxable Income, enter a description such as “1099-NEC income reversed” and a negative amount. 

The entry will be reported:

• on line 8z of Schedule 1 of the Federal 1040 tax return, and 
• on line 8 of the Federal 1040 tax return.

Make sure that you keep records of all transactions. Later, you may need to demonstrate to the IRS that this is not taxable income.

@andr414822