Combining 2 Turbo Tax Accounts to do a coupled return

My husband and I each have a Turbo Tax account.  Each year I have to do both returns, then copy data from each to the other. It seems like it would be simpler to do a coupled return, but I cannot figure out how to do that without opening a new account.

Is there a way to use one of the existing accounts to do a coupled return, or do I need to open a new account and manually input the carry forward data from the other two accounts?