My landlord put the wrong dates on my lease.

The last lease I signed had the same dates as my previous lease. An obvious mistake. The end date was last September. I signed in October.

I didn't say anything and just signed because I wanted the option of leaving midyear.

I am indeed leaving midyear. I'm good right? "Dear landlord, we are leaving in June. Our lease ended last September. Thanks for the memories. Give me my deposit".