How can I get the Tax Invoice for the App I have purchase

Follow these directions to view your Purchase History.

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

Search through the history until you find the purchase in question. Double-click (Mac or PC) or tap (iPhone/iPad) on the purchase and a window will open. Toward the bottom of the pop-up window is an option to resend the receipt.

M1 Mac mini, macOS 14.5;  Watch, series 7 GPS/cellular, watchOS 10.5; iPhone 12 Pro, iOS 17.5; TV 4th Gen, tvOS 17.5; HomePods, audioOS 17.5 and Airport Express w/ Airplay 2

Tax is charged on all purchases from the App Store and iTunes Store, regardless of your default payment method.

You can see that on the invoice.

Check your mailbox and see the invoice.

if you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK) 

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