RentMaster has an automatic extra fees and automatic extra charges feature.  This allows you to define a regular occurring transaction such as monthly broadband internet charges etc.

As of version 9.3 of RentMaster, automatic extra fees for owners and automatic extra charges for tenants will not apply if the tenant or owner are closed.  In the case of tenants, the option to keep open for transaction entry only will still not apply automatic extra charges.

Sometimes people forget to delete these automatic transactions, and they are continued to be applied when they shouldn't.  So this should help.