Ray, what is your filter made of? Is it a filter (removes materials by passing them through a filter material) or does it remove solutes via adsorption onto something like charcoal?
You won't filter out chloramine if it is a filter. You probably will adsorb it if it has something like charcoal. Maybe it has both.
I would just let the water sit for a few days. Chloramine isn't all that stable. If you haven't noticed a problem already you probably don't have a problem.