What are the differences between TurboTax Premier and Deluxe 2015, and which one would be the best option for my tax filing needs?

The main difference between TurboTax Premier and Deluxe 2015 is that Premier is designed for more complex tax situations, such as investments and rental properties, while Deluxe is better suited for basic tax returns. If you have investments or rental properties, Premier would be the best option. If your tax situation is more straightforward, Deluxe should suffice.