The verification code is used for security purposes when you register or make certain updates to your TikTok Ads Manager Account ID.

If you did not receive your verification code email, try the following steps:

1. Wait a few seconds to receive the code before trying again.

2. Check that your email address is correct. The email you use should be the same as the one you registered with on TikTok Ads Manager.

3. Search for "TikTok" in your inbox. The email will be from "TikTok For Business".

4. Check if the email is in your Spam, Junk, Trash, Deleted items, or Archive folders.

5. If you added multiple 2-step verification methods try using a different method, such as your phone number.

6. Try using the device you normally use to log in to TikTok Ads Manager.