I am flipping a property to sale or rent. If the house doesn't sale this year, it will be for rent. Can I file all of my expenses and everything for this 2017?

I am flipping a property to sale or rent. If the house doesn't sale this year, it will be for rent. Can I file all of my expenses and everything for this 2017? or do I have to wait? What can I file this year and what can I not file this year?