@mariacasby
I would go to General Income in Business Income for Schedule C and enter a General Income item that says "adjustment for duplicate 1099-K and 1099-NEC income", followed by the negative dollar amount.
I can't guarantee that the IRS won't wonder about this, but at least you will have reported all the income on the 1099-Ks and 1099-NECs and then adjusted within Schedule C to be correct.
It's a cleaner solution than just not reporting income that the IRS "knows" you got.
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