Projected cashflow is based on all active Subscriptions and Payment Plans.
By filtering the Item Type, you have an option to just see the Subscription revenue or just Payment Plan revenue. By default, this report will show the projections for the next 30 days, but the date range filter will allow you to change the date range to see more long-term projections.
You can access all the available reports, including the Cashflow report, by clicking on the Sales tab, selecting Reports, and choosing Cashflow Projection.
Learn how to filter and group your report results with our Filtering & Grouping documentation.