how can I enter 21-letter activation code when the six boxes shown in mine only allows for an 18-letter code?.


Thought the boxes may look the same size, every second box on the TurboTax CD/Download activation screen is slightly larger than the other ones. So you should be able to fit 21 characters in there. Ex: 333 4444 333 4444 333 4444

Here is a FAQ that may assist you:

You can resolve most installation key issues by carefully re-entering the key.

When you start TurboTax for the first time after setup, TurboTax prompts you to enter your installation key. If you see the Help with Installation Key page after you enter your key, there’s a problem with the key you entered.

Complete the following steps to resolve the problem:

Before you begin: Ensure that you have the correct installation key.

  1. On the Help with Installation Key page, click Back.
  2. Delete all the numbers in the installation key boxes.
  3. Click the first box and enter the first set of digits from your installation key.
  4. Continue through the rest of the boxes until you have entered all the digits, and then click Next.

Note: The installation key is a sequence of 21 digits. The digits are grouped into six segments. The segments alternate between three and four digits.

After you enter a valid installation key correctly and move to the next page, the Choose Activation Method page appears.

If you are unable to get to the Choose Activation Method page, please contact TurboTax Support.

Related Information

Where can I find my Installation Key? 


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