Where do I get my 16 digit verification code?

Your 16-digit verification code in on your W-2.  It is found in Box 9.

Where do I get my 16 digit verification code? i bought from costco

@kundanlalk, as KittyM answered above, the 16 digit verification code is a number found on your W-2 (box 9). The following feed provides more insight:

W-2 verification code

I purchased a 2020 Turbo Tax Deluxe from Best Buy - the 16 digit key code will not work.  Best buy is directing me to Turbo Tax for the solution  Can you help

Please see the following TurboTax Help article for assistance:  Activating TurboTax CD/Download software

If you are still having problems entering the code you can call TurboTax and speak with an agent.  TurboTax customer service/support does not have a single phone number but has many different phone numbers based on the type of platform used.  So that we can direct your call to the best person/department to help you:

1. Click on this link:  https://support.turbotax.intuit.com/contact/
2. Select your TurboTax platform.  
3. Ask your question / state your problem.  Do NOT use the word "refund' or you will get a phone number for tax refunds.
4. Click Submit.
5. On the next screen, choose the Call option and follow the instructions.  You will be given the approximate wait time.  

You'll get a toll-free number to a TurboTax expert who is specially-trained to handle your particular issue.