How can I find how much rent has been paid on a property?

Click through to the property in question from your dashboard page or the "Properties" menu on the left.

Under the property sub-menu, click on "Financial Reports":

Click on the "Rent" report and select the desired date range or tax year in the filter in the top right:

Click "Apply Filters" to run the report, which shows the amount and date the rent was paid to you, and to which rent period it relates.  The report can then be downloaded into a spreadsheet or printed: