How to Add/update item price list manually

BO>Sales> Pricing> Item price list

AU- tax incl price list

US- tax excl price list

Fill in the details as required for the region and choose the right application period.

Add the new price or modify as needed 

Then click on the Dimension price list icon            to update the SKU prices. Click to validate the SKU price and then validate the item price list

To verify price update, go to Inventory> item flash selling price