In the Online version, the only way to see what you entered into a prior year online return, would be to download the .taxyyyy file and install that year's Desktop program to open it. You can use this article on How to finish a prior year to download the .tax file.
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
