Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi,
Switching to a Business account directly is not supported from a 365 subscription. You must purchase it separately.
QA Assist has given you most of the steps to migrate, however, I would like to let you know that unless you need some specific business feature like multiple users for the same domain, you can keep using 365 personal until it lapses.
Purchase and compare here:
https://www.microsoft.com/en-in/microsoft-365/business/microsoft-365-plans-and-pricing
I hope this information helps. If you have any more questions, don't hesitate to reach out.
Otherwise, please take a moment to rate the answer. Wishing you good luck!