I have more than one turbo tax account, is there anyway I can combine them?

[Critter]

TTax does not allow multiple accounts to be combined into one account (or to split a single account into multiple accounts).

TTax does not permit an account to be closed. Your only option is to make sure you pick one account and use it all of the time. You cannot delete any return per se, however you can delete all of the information in a return.