When can I use Xero or Intuit to sign in?
Xero SSO is available only to customers who signed up for SimplePay via the Xero App Store.
Similarly, Intuit SSO is available only to customers who signed up for SimplePay via the QuickBooks App Store.
If you created your SimplePay account using an email address and password, you cannot currently switch to Xero or Intuit SSO.
Accounting integration and SSO
Please note that setting up Xero or QuickBooks as an accounting integration on SimplePay does not automatically enable Xero or QuickBooks SSO.