How can I find a list of memberships who have a pending cancellation date in the future?

Running the membership cancel report for the future 

-> Reports-->Memberships-->Membership cancel Report

-> Change Query to custom Query

-> Change Effective date to  >= and choose tomorrows date.

-> Click Search

-> This will provide you with a list of all memberships that will be canceled in at a future date.

->  You can display the results in different graphs and the report can be downloaded to a PDF or Excel.

Under Memberships the ability to filter on memberships that has a pending cancel

-> Quick Functions/memberships/Query Memberships - Active/Custom Query/ click Has Pending Cancel

-> Results will return members that are active and have a future pending cancel.