When we turn on the multicurrency, the system said "Some features may no longer be available".We want to confirm which feature may not available?

Welcome to the Community, @13633946205280874. I'll share information about the functionality of the Multicurrency feature in QuickBooks Online (QBO).

Once you turn on Multicurrency, you can pay and get paid in foreign currencies with customers, vendors, or bank accounts that do not use your home currency.

Before activating the Multicurrency feature, consider the following:

1. Once Multicurrency is activated, you can no longer turn it off due to the ongoing need to account for currency conversion information.
2. If you integrate QuickBooks Commerce with QuickBooks Online, Multicurrency will not be functional.
3. Activation of multicurrency will deactivate the cash flow planner in QuickBooks Online.

For comprehensive information on Multicurrency, please refer to the resource: Set up and use Multicurrency in QuickBooks Online.

Additionally, using the multicurrency feature may necessitate home currency adjustments. You can check this article: Frequently Asked Questions about Home Currency Adjustments.

Feel free to reach out if you have further questions or require assistance with any multicurrency concerns in QuickBooks. I'm here to help!