Shipping cost calculation for Paypal Express

[kubilaykiran]

Describe the bug
Shipping cost is sent as net even if the site has gross taxation.

To Reproduce
Steps to reproduce the behavior:

1. Go to the cart page on the site with gross taxation.
2. Click on the Paypal Express button.
3. Compare the shipping method prices on the Paypal popup with the storefront.
4. See the difference

Expected behavior
Shipping price should be sent as gross if the site has gross taxation.

Screenshots

Additional context
The possible root cause:
https://github.com/Adyen/adyen-salesforce-commerce-cloud/pull/1134/files
https://github.com/Adyen/adyen-salesforce-commerce-cloud/pull/1172/files

[shanikantsingh]

Hello @kubilaykiran,

For PayPal update order call we need to pass the total taxes separately. There is a validation that checks if the new amount is sum of total taxes plus delivery cost plus initial amount. So, since we have to pass the taxes separately we cannot include the shipping tax as part of the delivery cost as it will cause validation error. This also takes into account for the situation where tax rate could change based on the tax jurisdiction.

Regards,
Shani
Adyen