I assume that you are really using a desktop version of TurboTax as reported in the icon next to your user name.
The best way to do this is to create a new income tax return using the software putting in your best estimates of what your 2017 income tax numbers will look like. Presumably the answer will will show that you will reporting an underpayment penalty. You'd then use the "Underpayment penalties" interview under the "Other Tax Situations" tab. That interview allows you to annualize.
Tom Young