If you're using a CD/Download version of TurboTax, you may get blank screens when navigating through Deductions and Credits.
You can fill out the Deductions and Credit section(s) you need in Forms mode or by selecting I'll choose what I work on. We also recommend filing an extension and making any tax due payments, with that extension, prior to the April 15 deadline.
Make sure TurboTax and your computer are up-to-date. You can also try using TurboTax on another computer.
You can also finish your return in TurboTax Online.