Any import from outside the EU will be liable for both TAX and DUTY.
Duty is paid to control imports. For example if your country has a large manufacturing industry for shoes, the Government may charge a much higher rate of duty to protect the domestic shoe industry. However duty is most commonly charged at anywhere between 0 and 10%.
VAT or Tax is what the Govenment take of you as a 'TAX', this is a standard percentage 17.5% for the UK for instance. You can claim this back if you are a VAT registered business.
As for the exact rates of both the above, you can look here
http://www.revenue.ie/index.htm?/ser...in_taxhead.htm
I hope this helps.