You cannot permanently delete Amazon purchase history from your account
You can archive an order to hide it from the default Orders page
Sign in to your Amazon account
Go to Your Orders
Find the order you want to hide
Select Archive order
Confirm the action
To view archived orders, go to Accounts & Lists
Select Your Account
Open Archived Orders
You can also remove items from browsing history
Go to Browsing History
Select Remove from view on items you want hidden
To delete Amazon app activity, clear app cache and browsing data on your device
To reduce future purchase visibility, use separate Amazon accounts or profiles