Why did you enter a 1099NEC under the 1099MISC section? Are you using the Online version or the Desktop program? You seem to know it should have been on Schedule C. You can enter your income as Cash or General income. You don't need to get a 1099MISC, 1099NEC or 1099K. Even if you did you can enter your total income as General Income. Only the total goes to schedule C. You should be entering the income from your own records.
For Online....How to enter income from Self Employment
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
To fill out schedule C in the Desktop program Deluxe or Premier…..
Go to Federal tab
Click on Wages and Income - Continue
Pick - I'll choose what I work on
Then scroll way down to Business Items
Business Income and Expenses - Click the Start or Update button
