Hi glen-wigney-five,
Welcome to the QuickBooks Online Community family! The business address is an important part of your QuickBooks account set-up. I'll be happy to share more on this.
Each QuickBooks version is unique per region. Making sure you have the correct region for your account is very important to properly set it up in terms of tax structures, currencies, and languages. For business addresses, the system accepts corresponding regional addresses. QuickBooks Online Canada for example can only integrate Canadian addresses. If there's a QuickBooks version for your business region, that would allow you to insert your business address and you could perhaps explore the multi-currency feature for your business needs.
To learn more on multi-currency, check out this article: About Multicurrency
I hope this helps clarifies things for you. Have a great day!
