When you use Online TurboTax, you get one return per fee.  Each return needs its own account and user ID.   If you use the same account and user ID for a second return, you overwrite the first one and lose it forever.

When you use Desktop TurboTax, which you install from a CD or download to your own hard drive, you can prepare and e-file multiple returns for the cost of the software.  You can e-file up to 5 Federal returns—more if you mail the additional ones.  If you have multiple returns to prepare for family members, Desktop is more cost effective.

Desktop --unless you specifically buy federal  Deluxe only from a retailer-- will include the software for one specific state.   You can prepare as many returns for that state as the number of federal returns you prepare.  E-filing state returns is an extra fee which can be avoided by printing and mailing the states.   Additional--other--state software is an additional fee for the software.

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...

https://ttlc.intuit.com/questions/1901306-how-many-times-can-i-e-file-using-the-turbotax-cd-or-downl...

Online versions - ONE.

CD/download desktop versions up to 5 Federal returns can be e-filed and you can print and mail as many as you want.

Downloaded TT to my dads computer with the code. Now trying to download it to mine. But it says it’s already linked to my dads account. I thought we can do 5 returns from the cd/download version.  Or do I sign into my dads account and then enter my data in it. That dosnt seem right. 

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@Drewp808 wrote:

Downloaded TT to my dads computer with the code. Now trying to download it to mine. But it says it’s already linked to my dads account. I thought we can do 5 returns from the cd/download version.  Or do I sign into my dads account and then enter my data in it. That dosnt seem right. 

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The license agreement says you can install on up to 5 computers OWNED by the purchaser.  The license is linked to the owners account.

If he downloaded the Desktop program  you would need to log into his account to download it to  your computer.  Did he install it from the CD or by downloading it?

Yes the Desktop CD/Download program can do unlimited returns and efile 5.