As you know, our tax system (federal and states) is a pay as you go system, meaning that the tax authorities expect that you will pay your taxes throughout the year as you receive income, rather than waiting to the end of the tax year to pay your tax liability. This is accomplished by either having sufficient withholding from your various income streams and/or making quarterly estimated tax payments during the year. You may find this link to the IRS website helpful.
Based on the information contained in your question, it sounds as though you have intentionally overpaid your tax liability in the first quarter, and you believe that this will more than cover the shortfall in the 4th quarter. If you are correct in your calculation, you should avoid an estimated penalty.
And, should you learn that you do, in fact, have an underpayment penalty, TurboTax offers the option to try to reduce the penalty by annualizing your income.
I hope this helps!
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