aryan_56612

[cedar hound]

Do we need to store card details of the users or stripe does it from their end ?
You don't need to store card details in your databases, Stripe do this for you:
https://stripe.com/docs/payments/save-during-payment
or
https://stripe.com/docs/payments/save-and-reuse?platform=web&ui=checkout

Will stripe be saving payment methods of our users, if yes, how they can change or update them in future
The guides above tackle this. You collect another payment method and attach it to the customer

Can we use Stripe API and fetch payment details of our users to show on the frontend
You can't retrieve the card details (raw PAN) but you can display some information using this API:
https://stripe.com/docs/api/payment_methods

Does Stripe provide receipts and invoices ?If yes, can we request these documents in our desired format
Yes https://stripe.com/docs/invoicing
You can customize the branding of the invoice:
https://stripe.com/docs/invoicing/customize

Do Stripe provide API for tax computation across different states in US
You can use Stripe Tax
https://stripe.com/docs/tax

If we need to change subscription details of a particular user, how can we do it on stripe ?
You can refer to downgrade/upgrade:
https://stripe.com/docs/billing/subscriptions/upgrade-downgrade

What happens in case of recurring payment is failed
Stripe has smart retries:
https://stripe.com/docs/billing/revenue-recovery/smart-retries

What communications does stripe sends in case of failure of payment.
You can configure stripe to send emails to customer in order to update their failure payment method