You don't add anything to it. An amount is there because the person that issued it is saying that they paid you that amount. If you have additional income for this work, and you don't have another reporting form, enter it as cash.
Thank you so much for your reply Coleen!
🙂If I leave it blank will it cause an issue with the IRS? Because it keeps coming up as an issue when I do the "review section" to complete my taxes. Although I am able to still file without adding it. I just wanted to make sure. By the way I'm filing as an Independent Contractor for Uber, and I do have extra income through a tax summary, that they did not include on my 1099 nec, so I added it to a 1099k. Thank you so much!