If your company does business in more than one currency, you can manage those foreign transactions using multiple currencies.
QuickBooks tracks foreign sales and purchases, foreign bank accounts, provides you with the latest exchange rates, and helps you track foreign balances with reports.
Important: Multiple currencies settings cannot be changed or turned off once they're turned on.
What home currency should I choose?
Note: If you select a home currency other than the US dollar, Intuit payroll and online banking services will not be available.
How do I turn on multiple currencies later?
Use Preferences to turn this feature on.
In QuickBooks, go to the Edit menu, click Preferences, and then select Multiple Currencies.