Hi there, Abraham. I appreciate you for joining this thread, 

I'll route you to the best help to acquire the QuickBooks 2021 validation code.

You need to contact our support team to get the validation code of your product. Also, they can protect your account info at all costs. Here's how:

1. Click Help at the top menu and select QuickBooks Desktop Help.
2. Tap Contact Us. Type in a short description of your concern, then select Continue.
3. Sign in to your Intuit account. Then, Continue and then Continue with my account.
4. Choose either to chat with us or Have us call you.

If you want to learn how to fix errors when you enter codes in QBDT, you can read this article: Fix activation, license, and product numbers issues.

Come back if you have additional questions about acquiring codes to activate your account. I'll be willing to help. Keep safe always.