I cannot find a place to add the cost of the tickets that I sold online also I'm keep getting a check this entry notice telling me that the sales proceeds on the worksheet don't match the payment from the 1099k amount but they do please help
It depends. It sounds like you are in the business of buying and selling concert tickets and should be entered as business income and expense. To report this income, Turbo Tax will require you to upgrade to Turbo Tax online if you wish to claim to claim the expense you incurred for the cost of the tickets..
If you entered this income in any other manner, delete all the previous entries you made then follow the prompts I have listed above.