2014 tax for flips

[Bang Tran]

Hello everyone, I have a capital gains tax question. I purchased and flipped a house April 2014 and sold it in September for a profit. I turned around and bought another house in December and sold it in January 2015. So my question is do I need to file taxes and pay capital gains tax on my first house I bought in April 2014 or can I roll it over to 2015 with the second house I bought in December and sold in January 2015?

Thanks BP