The penalty may be for late payment of tax. Typically, if you owe more than $1,000 when you submit your tax return you will get a penalty for late payment of tax. It can also happen if you pay most of your taxes in toward the end of the year as you are required to pay taxes quarterly based on your previous or current year tax liability.
The only way you could protest that would be to submit a Form 2210 that will allow you to report your income on a quarterly basis so it may better reflect the tax payments you made during the year. You will see an option for that in the Other Tax Situations section of TurboTax. Choose Additional Tax Payments then Underpayment Penalties. You can amend your return by logging into your TurboTax program to complete and submit the Form 2210.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"