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With respect to your question...do you mean that when you go to Settings > Mail, Contacts, Calendars, and you tap "Add Account..." nothing happens? It should look like this (click for full-sized graphic)...
Followed by this...
Is that not the case?
If it looks like this you probably have Account Restrictions turned on.
To check go to Settings > General > Restrictions > Accounts. See if there is a padlock icon on the "Accounts" line. If so, tap that and change it from "Don't Allow Changes" to "Allow Changes" and see if that works.
BTW, I'm going to move your post to the Help section where it will likely get more responses.
Welcome again and enjoy!