You won’t be able to use Internet Explorer for Windows XP to access the Merchant Service Center after May 31, 2017. The good news is that any other browser (like Google Chrome) works just fine
 
Welcome to the merchant service center
The gateway to your QuickBooks Payments Account
  • Track your transactions, deposits, fees and statements
  • Update your account information
  • Access Help and resources for payments
Not a customer yet? Find out how you can start getting paid faster with Intuit QuickBooks Payments.