Option to renew lease

[Bob Costello]

First time landlord. I used real estate company to find first tenant. The lease started in May 2016 and ends April 30,2017. When do you give the tenants an option to renew the lease for another year? And when do you start looking for another tenant? In desirable area that I should be able to find a new tenant myself. Where do I find or can I find a contract to just extend original contract for another year? I am looking to raise rent 5% in new lease. Thanks Bob