Setting Total Declared Value for Packages and Retrieving Tax Charges in Response

Hi,

I'm currently using your package for rating and shipping elements. Based on the tests I conducted on the UPS platform, I've found that the request needs to include the total declared value for packages to ensure accurate ratings.

- Setting Total Declared Value:
How can I set the total declared value for packages in the request?

- Retrieving Tax Charges:
How can I retrieve the tax charges directly from the response?

These adjustments are crucial for accurate shipping calculations in my application. Any guidance or examples on how to achieve this would be greatly appreciated.

Thank you for your assistance!

No files or tests are identified in the issue. Start by reviewing the package's UPS request and response handling for rating and shipping, then determine whether declared package value and tax charges are already represented; done means the supported request and response behavior is clear and usable.

Written by the indexing model from the issue text.