This article will show you how to run a GL Summary report to determine the amount moving into/out of deferred revenue for a given time period.
Review the Reports Overview article to learn to use filters and fields, save a custom report, and set up a scheduled report email.
Instructions
Navigate to Reports:

Select GL/Revenue Reports, and then select General Ledger Summary or Long-Term GL Summary:

Note:
The difference between the two reports is that the Long-Term GL Summary has fewer options but runs much faster; the resulting information is the same. GL Summary is best for reports that require a lot of filtering; Long-Term GL Summary is best for reporting for long time periods.
Select the From and To dates:

Click Filters, then use the GL Filters and select all Deferred Revenue accounts:

Click Apply:

View the report:

GL Type: The type of payment account
GL Code/Desc: Displays the code and description for the GL item
GL Debit: Shows the total amount debited from the Deferred Revenue account, or in other words, the total amount moved from Deferred Revenue to be recognized in a specific Revenue account
GL Credit: Displays the total amount credited from the Deferred Revenue account, or in other words, the total amount placed into Deferred Revenue as a result of a patron paying for an activity or rental that occurs in the future
GL Net: Shows the difference between Debit and Credit, or the total change to the balance of Deferred Revenue for the time period
Note:
The Debit, Credit, and Net columns will always show four decimal places.