My rental was due back at 2pm Saturday but they didn't tell me that they closed at noon. Will I be charged for 2 more days if I return it Monday morning?

They will charge you. You have two options. First, you can drop it off at another location. Second, they will have an after hours key dropbox.

You should be able to return it at any Hertz venue, even the airport. You will have to negotiate about any extra fees....

You will get pending charges however those changes will be dropped in 5 to 7 business days depending on your financial institutions. Your return will get closed out on Monday for you Saturday return when Hertz reopens. You can drop off at an open location to avoid the pending charges.

Ok thank you. Im going to drop it off now.