Hello @ColleenMcGarrity , thank you for participating in PowerSchool Community!
It sounds like you are having trouble logging into an existing account. You should be able to click the "Forgot Password?" option under the sign-in page, which will send a temporary password to the email address that you have on file.
If you do not receive this temporary password, I would suggest starting a live chat or email case with our Support team, who will be able to reset your password. You can start a live chat or email case here: https://help.powerschool.com/t5/Support-Case-Chat/ct-p/SupportCaseChat