The instructions given by @ThomasM125 are correct but it is not under the Self-employment income and expenses that you can edit your 1099-NEC. Under the Federal section of TurboTax. Then, under Income and Expenses you will see Income from Form 1099-NEC, click on Edit/Add which will take you to 1099-NEC Summary and click on Edit next to the 1099-NEC which will take you into the 1099-NEC.
