How can I change my the currency to Naira?

Welcome to the Community, @culturefinservic.

I'd be glad to help you change your currency to Naira in QuickBooks Online (QBO).

To start with, you can change your home currency as long as you haven't set up the Multi-Currency feature yet. If so, you can follow the steps below on how to change your currency.

1. Click the Gear icon at the upper right corner.
2. Select Account and Settings. Then choose Advanced tab.
3. Go to the Currency section. Then click the pencil icon. 
4. Choose your Home Currency from the drop-down.
5. Hit the Save button. Then Done.

On the other hand, if you're unable to change the home currency it's because the Multicurrency feature is already turned on. The system does this so it won't mess up your books especially when adjusting the sales tax.

I'll also add these articles to help you start over if you just subscribed to QBO and to know about multiple currencies to help you do business with foreign supplies, customers, or employees. 

• Delete your data and start over in QuickBooks Online
• Multi-currency FAQ

Stay in touch with me if there's anything else I can help you with managing currency in QuickBooks. I'll be right here to provide the information that you need.