Alright so at first you can't create an account whatsoever, are you able to create an account? Now, you're concerned about creating an account with a name that's taken. The new tags have no effect when first creating an account. Although you still have to make an account with a username that isn't taken, once you log in you'll be able to choose your tag that you want. It's not randomized. Your desired tag you will receive BUT you need 10k firsts to get a tag. Tags were added into Miceforce just for fun, people can't make 4 accounts with the same username but different tags.