Thanks to everyone who posted; it looks like 7 years for almost all of these papers, which is longer than I wanted to keep them, but better safe than sorry. Will give my boxes one more go-over and get rid of anything that doesn't fit the "must keep for taxes" or isn't in the "this is interesting family information to know." I already had something like that pop out yesterday that answered a question I had had about how long my mom worked, at what age she retired, so it was good to get that answer and realize she was about a year older than I was when she retired for good.