You need a 14 digit (for 2019) or 16 digit (for 2020) License Code to activate the Desktop program.
Where is the License Code?
https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/852973
If you Downloaded from a retailer and can't find the License Code
https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/855903
