Greetings, @Luisf17cg. 

Thanks for joining in on this thread. I hope your day is going well so far. I can provide you with some helpful information about currencies in QuickBooks Online. 

Yes, we have a feature, known as multi-currency, that's available for QuickBooks Plus and Advanced versions of online. 

You can assign a currency to most types of accounts, including customers, vendors, bank and credit card accounts, accounts receivable, and accounts payable. Income and expense accounts always use your Home currency. Your Home currency is the currency of the country where your business is physically located. You can only assign one currency to each account or contact name, and you have to add a new account for each different currency that you will use in transactions.

If you don't think this would be a great fit for your business, then I recommend creating three separate accounts for each office. 

This should help answer your question about having different countries within QuickBooks Online. If you have any other questions, don't hesitate to reach back out. Take care!