This section of workSMART explains your right to claim Working Tax Credit (WTC) without being victimised. Some workers are worried that if they claim WTC their employer may dismiss them, indeed some employers have threatened to do this. That is against the law, and these questions should help you find out where you stand.
The Inland Revenue's tax credits site has more detail on these regulations: www.taxcredits.inlandrevenue.gov.uk
For more information, you can also ring the Inland Revenue tax credits information line on 0845 300 3900 (or 0845 603 2000 in Northern Ireland).