No. Online and Desktop are different. Desktop can do unlimited returns and efile 5 federal for free. The rest you can print and mail.
Online is only good for 1 return and 1 account. So you need to setup separate accounts for each person. The offer to switch to Online is only good for 1 return and account.
Turbo Tax Desktop to Online Migration Offer
https://ttlc.intuit.com/turbotax-support/en-us/help-article/marketing/ty25-ttd-direct-offer/L0aUgksJ...
"Offer includes one Tax Year 2025 federal return and one state tax return filed using the TurboTax Online"
You can start another return in TurboTax Online by:
Logging out if you are in your account
Choose what TurboTax Online product you want to use for the second return
https://turbotax.intuit.com/personal-taxes/compare/online
Create your account screen
Set up a new login for the second return
Start working on the new return
