I have configured magento 1.9.x CE to display catalog prices including and excluding VAT (TAX) at 20% which is working fine for logged in users under the "General" customer group. Both Incl and Excl TAX prices are calculated correctly for these logged in users.
However for guest users no TAX is being calculated, both prices incl and excl TAX are showing identical values.
All settings are configured correctly and the "NONE Logged in users" (guests) are set to use the same tax configuration as "logged in" (normal) customers.
Any thoughts on why VAT (TAX) is not being calculated for "Not logged in" (Guest) customers ?