Hi elainehu-gmail-c,
Welcome to QuickBooks Community! Having the ability to use the same QuickBooks Online login information, makes it easy to switch companies while on the go. I'd be happy to provide you with the steps.
Depending on which app you're using, the location for switching companies may vary. The Switch Company option is usually in the same area as Settings when the app is open. If you're using an Android device, you'll go to the Main Menu and select the Arrow beside the current Company Name and then Choose the Company. For iOS devices, select the Arrow next to the current Company Name, from the Main Menu and choose your other Company.
Should you have any additional questions or concerns, please feel free to reach back out. We'd be happy to help!
