How to Categorize 1099-NEC - Union Wage Replacement

It depends. If your husband is a union officer or a union employee, then it should be reported as self employment which is the specific designation this form is used for. Be sure to enter any applicable expenses which will lower the amount that is taxable.

1. Open or continue your return. 
   • TurboTax Online/Mobile: Search > Type 1099-NEC > Go to 1099-NEC
   • TurboTax Desktop: Search for 1099-NEC and select the Jump to link.
2. Follow the onscreen instructions. 
3. When you’re done entering the income, we’ll ask you a few questions.
4. Be prepared with any direct expenses you may have which will reduce your taxable income.

He is neither a union officer or employee. He is a union member who was paid replacement wages for a training that took place during work hours (topic adjacent too, but not the core function of his work as a union member). That's what's been stumping me -- I don't know how to categorize it.

He is an employee of a union job, is that correct? If so, the answer still applies.  Please update if it is unclear.

@1099nectaxquestion 

He is not an employee of the union. He is a member of the union. He is employed by companies that contract with the union.

From what you've said, that counts as self-employed income. I think it's just not a common use case.