Hi Zoe! It’s hard to tell what’s going on from the information that you’ve shared here. I have some follow-up questions for you to help better understand. When you say your Google Duo account, are you referring to the Duo video calling app? Or have you protected your personal Google account with Duo Mobile for authentication?
It sounds like you might be logging in to a website to submit an application using your Google Gmail account.
Having more information will help us to help you. Thanks in advance for clarifying!