#Manny_Manny_2023
formal sorrel
hello! you must attach the test clock when you create a customer
it's not possible to attach the test clock after you create the subscription / subscription schedule
woven fern
if a customer is already created can we attach a TestClock through api at a later date
formal sorrel
no, that's not possible
woven fern
can you attach a Test clock to a subscription that is being created?
formal sorrel
A test clock can only be attached to a Customer. So no, you cannot attach a test clock to a Subscription
you must create the test clock first, then pass in the test clock as a parameter when creating the customer
woven fern
thank you for your help
one more question
is there any way you can add a subscription item to a subscription outside the billing cycle, lets say the billing cycle of currenct subscription is 27th July to 27th August but i want now to add a SubscriptionItem on 31st August how is it possible
formal sorrel
sure, you can use Subscription Schedules to schedule that change https://stripe.com/docs/billing/subscriptions/subscription-schedules
woven fern
so i have to add it in phases?
formal sorrel
sort of, you have to define the phase you want to add that subscription item in
verbal starBOT
woven fern
but it will add to the current subscription only right it wont create a new subscription?
formal sorrel
yes, it will add to the current subscription. You should try it out