i am using magento 2 where using paypal while order placed invoice generated automatically how to stop i want to generate it later from admin manually.
You can change the payment action to
Authorization in this case payment will only authorize not capture(not generate Invoice). But make sure that you know the difference between payment actions.
Store > Configuration > Sales > Payment Methods > PayPal Express Checkout > Basic Settings - PayPal Express Checkout > Payment Action to Authorization.