If you bought the TurboTax Standard Online 8 return package, then you must use all 8 returns in the same account.
If you didn't buy the 8 return package, then each return will be charged separately.
If you
are still unable to resolve this issue, please contact our phone support as
they will be better able to assist you (*Not available for TurboTax Free
users*). https://turbotax.community.intuit.ca/replies/3152013