if you're still waiting for acceptances by then and your grades are good and you can afford it, I would do it.
I dont think you are required to do so pre-acceptance, but once yuo are accepted to a school ur supposed to send you final transcript so they can make sure u didnt fail any classes (or get below a C)
Some schools do ask for them (Indiana for example wants them every semester/quarter after I receive grades, and Northwestern wants an updated official transcript when you come to interview).
But unless they will really help you or unless they ask for them, you aren't obligated to give them to them.