To find your invoice in iTunes
- Open iTunes on your computer
- Sign in with the same "Apple ID" used to make your purchases
- Click your name in the upper-right corner of the iTunes window and select "Account Info"
- Scroll down to the "Purchase History" section and click the "See All" link to view a full listing of all your iTunes and App Store purchases, including in-app purchases. To view the details of a particular purchase, including date, order and Invoice number, click the arrow to the left of the order date.
- This is your invoice; details are displayed in the top-right corner