Car tax???

Can someone plz advise me as to how much my car tax will be for a year? its a 2003 vw 1.9 polo s sdi. . i have read somewhere that it depends on co2 emissions?? how do i find out what they are for my car? help would be appreciated! i live in the uk!
Answer
Hi, im a sales administrator. you will find the co2 emission on your log book. then to find out the cost log onto dvla.gov.uk and download a v149 form which will give all the prices.