In Financials Operations, the Search Invoice Register page, pre-populates the Date 'Search From' and 'Search To' with the beginning and end of the current month.
This is by design and is part of the core code on the webpage. It cannot be turned off. However you can exclude the filter from the results.
To ignore the preset data filter and save this preference for future:
Find the Date filter in the filter pane and change the Criteria to None
This will blank out the Search From and Search To values
Below the Find Now magnifier icon in the ribbon, click the small drop down arrow and select save.
This will save the Date criteria to be set to None and any other filter you had selected (including the Status's; such as Awaiting Approval, Rejected or Posted)
This will be saved for yourself only
Now when you next load the Search Invoice Register page, the Date Criteria will be set to None **you will still see that the Search From and Search To is pre-populated with values. However it will be ignored**