[ImJamal]

I am not sure the differences, but turbotax has an online version.

[jasode]

The online version is only for filing one return.

Desktop installed version can file multiple returns so the overall cost is lower.

https://ttlc.intuit.com/turbotax-support/en-us/help-article/...

[ImJamal]

Most people will just have one federal filing so it doesn't seem like it is an issue for most people.