Optionalaccount_Optionaldays_Number of days within which a customer must pay invoices generated by this subscription schedule. This value will be null for subscription schedules where billing=charge_automatically.
OptionalissuerThe connected account that issues the invoice. The invoice is presented with the branding and support information of the specified account.
The account tax IDs associated with this phase of the subscription schedule. Will be set on invoices generated by this phase of the subscription schedule.