multiple 1099 nec for same business

You can enter them in the business section instead of in the regular income section.  Before you do that, delete the ones that you have already entered.

To enter your 1099-NEC on one Schedule C select the following:

1. Federal
2. Income and Expenses
3. Show More next to Self-Employment
4. Start next to Self-Employment
5. Yes, to you have any self-employment income or expenses
6. Enter the type of self-employment work you do and you can select that you use your name for your business
7. Click through a few more screens and you will get to a screen that says "Your XX info"
8. Click Looks good
9. Then you will come to a screen that says Let's enter the income for your business.  It will give you the option of 1099-NEC or Other self-employed income including the 1099K , cash and checks.  Here is where you will enter your 1099
10. If you do not select one, it will not let you enter your income.  
11. Enter your self-employment income on the next screen.
12. When done, select add another.

* Please note navigation may differ slightly depending on which version of TurboTax you are using*

You can also choose to not enter the 1099-NEC's and instead just enter all of your income as a combined total.  Just keep the 1099's for your records then.