Hi there, Themba,
It looks like there's a duplicate post in the Community forum. Irene R has already responded to your original post regarding the Home Currency change in QuickBooks Online.
You can follow this link to reply to Irene's response, and we can continue to assist you further:
https://quickbooks.intuit.com/learn-support/en-za/reports/re-hi-my-account-is-set-with-home-currency...
Please remember to tag my name in your reply on the Community forum if you have more questions about account management-related concerns in QuickBooks. I'm here and ready to help you. Have a great day!