Hi Bonnie107,
Thanks for reaching out here. Welcome! In QuickBooks Online, the option to add multicurrency is a great way to record transactions and accurately apply the associated exchange rates, making your account reconciliations a breeze. However, if you prefer not to activate multicurrency in QuickBooks Online, you can also manually add an account to your chart of accounts and set the currency there.
Please feel free to reach back out, if you have other questions. We're always happy to help!