You don't make a 1099NEC for yourself. If someone pays you $600 or more in a year they are suppose to give you the 1099NEC from their business. But individual people don't have to give you one. You report your income as Cash. To show proof of income you probably give them a copy of your tax return with Schedule C.
You only give 1099NEC to people you pay $600 or more to. But not to yourself. You don't pay yourself. All the business income and expenses are your personal income and expenses in the first place. You just fill out a Schedule C. The net profit or loss is your income. If you have a net profit of $400 or more on schedule C you will pay SE self employment tax on it in addition to your regular income tax. It's all included on your personal 1040 form.
