Go to the settings and choose the TAX table.
you should see a menu like like
Tax options?|Standard rates?|Reduced rate rates?|Zero rate rates
I had to add a row to “Standard rates” and “Zero rate rates” with * in all columns apart from Rate % which is set to 0.0000
Next click the Tax options and set
Prices entered with tax?Yes, I will enter prices inclusive of tax
Calculate tax based on Customers address
Shipping tax class Zero Rate
Display prices in the shop Including tax
Display prices during basket and checkout Including tax
I hope that helps