To Delete Your Pottermore Account, you have to Log in to your Pottermore account. After that, Click on ‘My Details’. Then, Scroll down. At the bottom of the page, under ‘Confirm Changes’, there is small text that states, ‘To close your Pottermore account, you need to click here.’ You must Click on the highlighted blue text. Then, Enter your password and select ‘Yes, close my accent’.