In the FlexPay platform, you can search/filter for data by choosing a specific date or date range. 

At the top right of the page, below your account username and client name, there is an icon of a calendar showing the date 

Click on the downward pointing arrow to select the required date(s). 

You can select a date range by selecting the first date then the second date as indicated in the picture above.

OR you can select the same day date range by selecting the date twice.