If you receive both a 1099-NEC and a 1099-K for the same income, Here are some these steps to avoid double reporting but to help ensure the 1099s match IRS records.
Report Total Income: Enter the total income from both forms in TurboTax.
When entering the 1099-K, TurboTax will ask if any of the income reported on the 1099-K is also reported on another form (like the 1099-NEC).
Indicate that the income is also reported on the 1099-NEC. TurboTax will then adjust to ensure the income is not double-counted.
Enter a Negative Entry: To account for the duplicate income, enter a negative entry under (log into TurboTax and click on the link "Other Income") with a note like "Income duplicated on 1099-NEC and 1099-K." For more information, check the TurboTax support page.