The installation key (also known as a license code) is a 16-character alphanumeric string required to activate the software. Without this key, you cannot complete the installation or file your return.
Once you have the .exe (Windows) or .dmg (Mac) file, follow these steps: TurboTax Support
Please review this official TurboTax Canada link before responding further: https://turbotax.community.intuit.ca/turbotax-support/ TurboTax Support File Previous Years' Income Tax Returns - TurboTax® Canada