Tax Rates in areas charging a single VAT rate are generally very straightforward, as only the VAT rate (usually 5% or 20%) needs to be entered in WooCommerce and QuickBooks, then mapped together in MyWorks Sync. 

In WooCommerce, these rates should be manually set up in WooCommerce > Settings > Tax. No automated sales tax calculation service should be necessary in WooCommerce, as these rates do not vary once set up.

In QuickBooks, these rates can be added as Sales Tax Items in the Item List, if not already present. Once added in both WooCommerce and QuickBooks, they can be mapped together in MyWorks Sync.

What's needed:

• In MyWorks Sync > Settings > Tax, set a taxable and non-taxable code - normally "G" and "E". The tax code format should be set to "Sales Tax Code".

• In MyWorks Sync > Map > Tax Rates, your WooCommerce tax rates should be mapped to the corresponding QuickBooks tax codes - normally called G, V, etc.

Once set, orders will sync from WooCommerce to QuickBooks, preserving the tax treatment (or lack thereof) in WooCommerce.