Hello marylynn and Welcome to the Board!
I'm not sure I entirely understand what you're trying to do, but here goes...
Let's say your dataset cover Cells A1:E100. If your Pivot Table was built using these Cells as its source data, it doesn't matter whether you then filter on this source data - your Pivot Table will still pull in all of the information held there.
Is there a reason you're not you're filtering on your source data and not within the Pivot Table itself?