To use your prepayment code, you will first need to sign in to your TurboTax account (or create a new one) and follow the instructions on the screen. It will ask you for your code.
For step-by-step instructions on how to input your pre-payment code on TurboTax online, please see our TurboTax FAQ:
In TurboTax Online, how do I use a prepayment code... (intuit.ca)
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