How do i change the email address where quickbooks sends subscription invoices???

Welcome to the Community, naykel. 

I'd be glad to help you change the email address where QuickBooks Online subscription invoice is sent to. 

Subscription invoices and billing notification are sent to the Master or Primary admin user on file. You can follow these steps to update the email address. 

1. Go to Gear icon and select Manage users.
2. Within the Users tab, find the master or primary admin user type.
3. Select Edit under the Action column.
4. Change the email address.
5.  Select Save.

Also, I'd like to share these articles for your future reference: 

Manage billing, payment, and subscription info in QuickBooks Online

Feel free to message us back if you need any help with changing your email address. Have a nice day!