If you are used to using the Desktop CD program you may not like doing it Online. There are some big differences as explained above. When you are done be sure to download and save both the PDF and the .tax2018 data file to your computer so you can access them in the future if you need a copy or ever need to amend.
If you do decide to switch to Online here's how to Transfer 2017 from your computer.
https://ttlc.intuit.com/questions/1900883-how-do-i-transfer-last-year-s-return-to-turbotax-online
