How to inform tenant I will not be renewing their lease and sell

[Steve S.]

I have a tenant whose lease ends may 31st. I plan to sell the property as soon after 5/31 as possible. 

I’ve never done this before so are there legal obligations I have to inform them by a certain date?main issue is with taxes going up, they can’t accept the rent increase necessary to cover it so I plan to sell the property.