agreed - fine the original photo and then edit that with any editing you feel you need to and save it (to a different name under save as - so you keep a copy of the original - copy and paste the original into a different folder if you worry about hitting save instead of save as) then take that.
I think some places might offer or do their own post processing so if you can take a copy of both along with you - the one you edited would at least give them a guide as to how you intend the photo to look if they are going to use their own processing