I need assistance on why my husbands 1099-NEC is needed for review

Did your husband receive nonemployee compensation on the Form 1099-NEC?  If he did, you would need enter info under both 1099-NEC and Schedule C.  

I will suggest you to delete the existing 1099-NEC.  Here are the steps:

In TurboTax online version:

1.  Sign into your account, select Pick up where you left off

2.  Select Tax Tools, click on the drop down arrow

3.  Select Tools

4.  Under Other helpful links, choose Delete a form

5.  Select Delete next to the form 1099-NEC and Continue with My Return

Then, you will enter his information in both Form 1099-NEC and Schedule C sections.  You would start from the 1099-NEC section under "1099-MISC and Other Common Income".  You would then follow prompts to tell the program you are filing a Schedule C.  As it creates a Schedule C for you, you will need to go to the Schedule C portion separately to confirm your income amount, add related expenses and complete required information. 

In TurboTax online, here are the steps: 

• Sign into your account, select Pick up where you left off
• From the upper right menu, select Search and type in 1099nec and Enter
• Select the Jump to 1099nec
• Follow prompts to complete the section

Then 

• From the upper right menu, select Search and type in schedule c and Enter
• Select the Jump to schedule c
• Next screen, "Your 2020 work summary" under your self employed business, select Review
• Continue to enter related expenses and other required information

One of the most common reasons you’d receive 1099-NEC (Form 1099-MISC in prior years) is if you're self-employed or did work as an independent contractor during the previous year. The IRS refers to this as “nonemployee compensation.”

The amount will show on line 8 of your Schedule 1 and Form 1040.