I just finished filing my taxes with turbotax deluxe. How do I file another person's taxes on my account? I read that I can e-file up to 5 on one account.

You are posting from online Deluxe.   With online TurboTax you get ONE return per fee--not five.---that is only with the CD/download.

 

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.

 

 

 

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596

 

 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/questions/1901306-how-many-times-can-i-e-file-using-the-turbotax-cd-or-download

 

https://ttlc.intuit.com/questions/2750704-what-are-the-advantages-of-the-turbotax-cd-download-software-over-the-online-version

You must use the CD/download product to be able to efile up to 5 federal tax returns with the purchase of one product. You just start a new return to file another person's taxes.

 

If you are using the online product, it can only be used to file one tax return. You must create another account and pay again to do another person's taxes.