upper earnings limit for working tax credit

[queen 1954]

hi, does anyone know the maximum you can earn per year and still be entitled to working tax credit for a single person,have looked at all the websites and cant find this information anywhere.thanks in advance

[New Judge]

This HMRC page gives you a questionnaire to complete to see if you qualify:

http://www.hmrc.gov.uk/taxcredits/who-qualifie s.htm