Let's start with the S-Corporation return that you filed.
A 1099-NEC is issued to a person or a company. You need to double check the 1099-NEC that you received and make certain that it was issued not to you as an individual but to your company.
If it was issued to you personally then you should take the 1099-NEC and enter it into the personal return as business income. You'll pay self-employment tax on the taxable amount after any expenses are deducted. In this case you should not file an S-Corporation return at all nor enter a K-1 onto your return.
If the 1099-NEC was issued to the company then you would create the S-Corporation return and that creates a K-1. In that case you will enter the K-1 into your personal return but not enter anything into the business income section. As a single member S-Corp you are required to pay yourself a reasonable salary which then has to have a W2 issued to you by your own company. If you did not do that this year then you should definitely get to work on doing that for 2023.
Either way, you only enter business income one way or the other - either in the business income section or through the K-1. Never both.
@lmlm18
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