Issues activating 2018 software

[cmacel]

I'm trying to catch up on back years taxes. I've found the software for the 2018 turbotax netfile and have it downloaded on my computer. The option for internet activation is not working - unable to connect. Then defaults to phone activation- where that number is no longer in service, and the automated line directs me to this site. The 2018 software has a 21 digit activation code (VS the current 16, so again website does not recognize it, and will not allow me to activate the software. Please advise.

[TurboTaxSusan]

Please see this TurboTax FAQ for more info on activating older versions of TurboTax Desktop (2019 & earlier): What if I have trouble with my licence code while setting up TurboTax Download?