Lease renewal. When to sign, when to cash check.

[Chintu Kalidindi]

Hello, I have a newbie question. My tenant's current 1 year lease ends June 30th. We both have mutually agreed to renew their lease with a 1 year upfront payment. When can I ask them to sign the new lease? When can I cash the check? We both trust each other. I am thinking signing and cashing at 30 days before the current lease expires is reasonable. TIA!