Yes only the Desktop program can do multiple returns and efile 5 federal. the rest you can print and mail. In the Online version you get 1 return per account and need to pay for each account.
You can buy the Desktop Download program here or in stores or online like Amazon, Costco, etc.
https://turbotax.intuit.com/personal-taxes/cd-download
Authorized Sellers
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-product-orders/obtain-authentic-t...
2024 Turbo Tax Desktop Download System Requirements
Windows 10 or later or Mac OS Ventura 13 or later (newer).
https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements
