Hi I have sent you a message using your contact form regarding this issue.
The question speaks for itself.
Hi, thank you for the post!
Amazon Appstore Tax Withholding rate can be differ depends on developers tax information. The default tax withholding rate is 30%, and you should receive 70% of the List Price for the applicable Amazon Marketplace as of the time of purchase after taking your tax withholding.
For more information about Tax Identity Interview for International Developers, please refer to the below site:https://developer.amazon.com/docs/reports-promo/setup-tax.html#tax-identity-interview-for-international-developers