Depends. Where did you copy that? Can you post a link? Maybe it means you can file the returns online using efile instead of mailing. But that post seems to be referring to the Desktop program.
Yes Online is different than the Desktop program. If you do switch to the Online version you can transfer from last year's desktop return. You will need the data file ending in .tax2023 to transfer into 2024 either to the Online version or the Desktop program.
If you used the Desktop program before you may notice several differences and may not like the online version. It has less features and no Forms Mode. The Online versions don't have all the same forms so you might have to upgrade to a higher Online version. You can only do 1 return. Your return is only saved online so be sure to save both the .tax2024 data file and the pdf file to your computer when you are done. In case you need to amend in the future or if you need a copy to get a loan or something. You might not be able to access your online return when you need a copy.
