Over paid in Tax return, what should I do?

[Jack Zhuang]

It's that time of the year, I decided to do my taxes early this year and submitted my tax return last week. As I'm going through my rental leases today, I realized I forgot about a one month vacancy in one of my properties and have falsely reported one extra month of rental income on my 2019 tax return.

I had a net profit for my combined rental properties in 2019 and overpaying for income which I didn't make hurts!! 

So what should I do? I already got my state tax return back. Can I deduct it from my 2020 income? thanks!

-Jack