https://turbotax.community.intuit.ca/community/troubleshooting/discussion/trouble-activating-2018-software/01/3911230#M47370 <P>i have installed turbotax 2018 home and business</P><P>entered license key</P><P>internet activation server no longer in service</P><P>TurboTaxDesktopCA_Activation.exe as administrator</P><P>select 2018</P><P>enter computer key</P><P>popup "error: notfound"</P><P>i have tried with all firewalls and anti virus disabled.</P><P>not sure where to go from here</P> Wed, 13 May 2026 04:23:00 GMT user17784711743 2026-05-13T04:23:00Z https://turbotax.community.intuit.ca/community/troubleshooting/discussion/trouble-activating-2018-software/01/3911230#M47370 <P>i have installed turbotax 2018 home and business</P><P>entered license key</P><P>internet activation server no longer in service</P><P>TurboTaxDesktopCA_Activation.exe as administrator</P><P>select 2018</P><P>enter computer key</P><P>popup "error: notfound"</P><P>i have tried with all firewalls and anti virus disabled.</P><P>not sure where to go from here</P> Wed, 13 May 2026 04:23:00 GMT https://turbotax.community.intuit.ca/community/troubleshooting/discussion/trouble-activating-2018-software/01/3911230#M47370 user17784711743 2026-05-13T04:23:00Z https://turbotax.community.intuit.ca/community/troubleshooting/discussion/re-trouble-activating-2018-software/01/3911573#M47375 <P>Please contact our <A href="https://turbotax.community.intuit.ca/turbotax-support/en-ca/help-article/tax-return/contact-us/L1h8P3E0x_CA_en_CA" target="_blank">phone support</A> for assistance.</P> <P>&nbsp;</P> <P>Thank you for choosing TurboTax.</P> Thu, 14 May 2026 13:48:58 GMT https://turbotax.community.intuit.ca/community/troubleshooting/discussion/re-trouble-activating-2018-software/01/3911573#M47375 TurboTaxBrenda 2026-05-14T13:48:58Z