To create a smart for open payments (payments awaiting to be applied) follow the below instructions.
From the BusinessMind home page click on the Sales link.
From the Sales home page locate the View Invoices section and click on the +New SmartSet Query link.
Modify the smart set name to your need.
Select the columns you would like to appear; We recommend Amount Due, Amount Paid, and Amount Credited.
Select Amount Due from the drop down menu, is greater than, 0
Press the plus icon then select Payment Number, contains, (leave this area blank as per the attached screen shot)
Save and run your smart set.