Charge tenants monthly sales tax in AZ?

[Lisa Carpenter]

The first time I rented, a realtor did everything for me.  He charged a 1.5 sales tax against the monthly rent fee.  I did not specify that I would be charging sales tax when I accepted their application and approved them.  I am meeting them in a few days to sign the lease.  Am I required to charge them the sales tax?   Or can I just charge them the rent fee?

Also do I have to write a check to the state for the sales tax, or is this done automatically when I file my taxes?