You need a separate program for each year.   You cant access the 2018 program from within 2019.

Thank you Lisa. I do have separate 2016 through 2018 programs. Upon trying to open 2016 i was told i needed Administrator permission ( i am a sole practitioner) ,  however the ProSeries  response was that they were unable to connect to administrator.

Ugh, I know Ive seen people get that message before, I cant remember the fix for it....if you right click on the desktop icon and choose Run As Administrator does that help at all?

Unfortunately i got the same " unable to validate credentials" message. Lisa, thanks for your assistance, i will deal with this when time permits.

See if this helps at all, I havent read through it, but sounds like your message.

https://proconnect.intuit.com/community/help-articles/help/proseries-login-error-unable-to-validate-...