You appear to be using TTax On-Line --NOT
the downloaded desktop version that is installed on YOUR computer.
If you are using the On-Line version,
one of the features is that the user ID/account can be used for
ONE and only one tax return --e-filed or printed/mailed.
(Has always been this way)
If you need (or try) to prepare more
than one return you MUST create a new user ID/account and pay for EACH return
--if you want to use the on-line version. The same e-mail address can be
used for multiple DIFFERENT account ID's.
If you try to prepare a second return
using the same ID you will overwrite all data for the first return
and it will be lost forever; thus if the IRS challenges your first return you
will no longer have a basis
to respond to questions.
Starting another return (with the Online
version)
https://ttlc.intuit.com/questions/1894512-how-do-i-start-a-second-return-in-turbotax-online
