Probably rookie mistake but you have to marvel at how this new and improved platform from Intuit could allow clicking the button more than once (or something to that effect) to create multiple posts.

@laurie1 Welcome to the Community.  You can create and prepare returns all the way back to 2013.  If you are in PTO but don't see any years other than 2018 and 2019, contact Support so that they can fix it for you.