Thanks for posting in the Community space, @bt14.
Allow me to share some insights about changing your customer Bill To information in QuickBooks Online (QBO).
In QBO, changes made to your customer information are retroactive. That being said, it’ll also update those past transactions. This way, we’ll ensure your records are accurate and up to date.
To learn some tips and best practices in managing your customers, you can utilize these articles for reference:
Please let me know if there’s anything I can assist you with. I’d be more than happy to help you out. Take care and stay safe.