Hello @fwong,
Welcome to the Community. I can provide some clarification about setting up the address in QuickBooks Online.
The postal or ZIP code format will depend on the country you choose when signing up for the subscription. Since you're using the international version, I recommend checking the requirements if it contains letters, digits, or both, including spaces or punctuation.
For additional reference, I've attached an article you can use to learn more about how to update business information in QuickBooks: Change your business name, contact info, or VAT in QuickBooks Online.
If you have additional questions or concerns while working in QBO, leave a comment below. I’ll be happy to help you out.
