You need to make estimated tax payments on a timely basis. For instance, you can't wait until January and pay all off your tax due for the previous year and avoid a penalty for late payment of tax. Your tax needs to be paid in on a quarterly basis. So, you can get a penalty for late payment of tax even though you get a refund, as the timing of those payments is key in determining a late payment of tax penalty.
In your case, it looks like you paid the tax for the income earned in the fourth quarter on a timely basis, so if you have a penalty showing in your program, you can choose the Underpayment penalties option in the Other Tax Situations menu tab in TurboTax to use the Annualized Income Method to report your income by quarter which may eliminate the penalty.
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