I've been trying to figure out how to extract the Tax information for purchase orders but I couldn't seem to find any standard reports or data sources that contain such information such as the Tax amount or Tax codes. Has anyone came across such report or information in the system which could be used to create a report or data source?
There is one data source which can help you to extract the tax details.
Data Source Name - Data Source for all VAT / Sales Tax Items with Journal Entry Details
This provides data for VAT and sales tax items in the tax register including additional journal entry details. You can display the tax attributes for each source document, for example tax code or tax rate, and amounts such as base, deductible and non deductible tax amount. The data source also includes the G/L accounts to which the costs or revenues and taxes are posted as well as further journal entry details. Company, set of books, and kind of date (tax due date or posting date) are mandatory variables for this data source. The tax countries Canada, India, and Mexico are not supported. For more information see the documentation of the report: All VAT / Sales Tax Items with Journal Entry Details.
Can you build a report on this data source & try?