A Payment MethodPayment Method - A bank account (checking or savings) from which your user's withholding transfers are pulled, or withdrawal transfers are returned. Each payment method has a unique paymentMethodId. represents the bank account from which the tax payment will be charged. The Payment MethodPayment Method - A bank account (checking or savings) from which your user's withholding transfers are pulled, or withdrawal transfers are returned. Each payment method has a unique paymentMethodId. can be any checking or savings account that has routing and account numbers. Each Payment MethodPayment Method - A bank account (checking or savings) from which your user's withholding transfers are pulled, or withdrawal transfers are returned. Each payment method has a unique paymentMethodId. has a unique paymentMethodId.