While I was registering to the forum, I had a problem and entered wrong date of birth and username, I REALLY need to change them
I don't know that you can change any piece of data you like, but here are directions for what you can change:
Adobe ID, sign-in, and account help -
Moved from Downloading, Installing forum to Forum Comments forum
Depending on your (latest) application, you may try a chat,
Creative Cloud support (all Creative Cloud customer service issues, chat open between 5AM and 7PM PST/PDT on workdays)
Adobe ID and registration support (non-CC, chat open between 5AM and 7PM PST/PDT on workdays)
or we may ask a forum staff friend to look into it.