Hello
I am Prakash and happy to help you with your question, I'm a Microsoft consumer like you.
You can get to the Additional security verification page by following these steps:
Sign in to the My Apps portal : https://myapps.microsoft.com/
Select your account name in the top right, then select View account.
Under Security info select Update info.
If you decide that you want to change the default security verification method you're using, here's how: https://account.activedirectory.windowsazure.com/proofup.aspx?proofup=1
From the Additional security verification page. page, select the method to use from the What's your preferred option list. You'll see all of the options, but you can select only the ones that are made available to you by your organization.
Reference : https://support.microsoft.com/account-billing/c801d5ad-e0fc-4711-94d5-33ad5d4630f7
In case of additional questions, reach out back to us, and we will be happy to help and try our best to resolve your issue.
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Best Regards, Prakash