@xloganm15 we have now implemented a new feature called Global Scripts. This effectively allows you to run custom Javascript inside your account which makes it useful for these kinds of preferences, as you just write a script to clear the fields.
Global Scripts are part of the advanced customisation tools so they will require a Power User Subscription. If you have an active subscription I can add this script to your account.
For anyone looking to implement this on their own you can add the following single line statement to the scripts section.
//Clears the receipt date
$("#txtreceiptDate").val("");
//Clears the due date
$("#txtdueDate").val("");