This is an extension of the existing Landed Costs beta.
As part of the landed costs feature, taxes are now included in inventory upon receiving when the "Apply to Landed Costs" option is selected on the tax code setup. This setting is enabled at the site level in Business Setup > System Data > General (Taxes). This can also be toggled on the individual purchase order tax line - doing so only modifies setting for the individual purchase order.
Here's a video on the including taxes in landed costs.
Additionally, shipping costs on standalone fee-only purchase orders (and any other fees on fee-only purchase orders) can now be applied to inventory via this Link Purchase Order button. Each fee can be linked to a single purchase order. Additional fees on the same fee-only purchase order can be linked to other purchase orders.