Can you be more specific? Where are you trying to change it?
If you receive a Form 1099 and the amount is incorrect,you can ask the payor to correct it. They can destroy the incorrect one if they have not already sent it to the IRS. If it's too late, they can issue a corrected form.
However, it is not advisable to change the Form 1099-Misc. You may however, include any additional income earned as other income when you file your tax return.
If you would like information on how to access the 1099 MISC section of TurboTax, click this link: Where do I enter a 1099-MISC? - Community
If you need a more detailed response, please post an additional request.