Can I keep part of tenants rent for damages?

[Jack B.]

1) Their lease started 9th of September 2021, it was a month to month rental. They have to give 20 days notice before the end of the rental period. They gave notice April 9th 2022. 

2) They left their bed and some other garbage behind. There was no security deposit. Can I use part of their last months rent prepayment to pay for hauling their garbage off?

[Nathan Gesner]

If he's on a month-to-month lease, he is supposed to give at least 30 days notice, not 20 days. He gave notice April 9th, so he's responsible for rent and other expenses until May 8th.