How to get an invoice for my AirPods?

If this is about an app or subscription you bought from Apple, bring up the purchase list, click next to the item you purchased, and you will see an option to send an invoice via mail.

View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

If you bought Apple hardware online, have a look at these steps:

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Once an item is shipped or picked up, Apple will create an invoice for your order. To view or print your invoice, go to your Order Listing

(Opens in a new window)

 page and select an item to go to the order details. Then, select View Invoice at the top of your order details page to access your invoice.

If you need help viewing or printing your invoice, speak with an Apple Specialist at 1‑800‑MY‑APPLE.

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copied from: Viewing & Changing Orders - Shopping Help - Apple

If you bought something in an official Apple Store or at an Authorized Apple Reseller or Service Provider, and they can't understand your language and you don't speak their's, you might have to use the Apple iOS "Translate" app on your iOS device. Select the language to use for both sides and tap on the microphone icon to start translating the conversation.

You're welcome 🙂

Good Luck!