Just to confirm, are you trying to make payment for your subscription? If so, you can pay it from within your QuickBooks account. I'll show you how to do it.
To subscribe or renew subscription:
Go to the Gear icon at the top.
Under Your Account, select Your Company.
Click Subscribe or Renew to open the subscription renewal page.
Enter the Billing Address details and check the Terms, Conditions checkbox, and click Continue/Make Payment.
Select the payment option and follow the on-screen instruction to make the payment.
Once the payment is made, your company account will get renewed.