Your tax for 06-07 year will be based on your total taxable income for the year. If you have been getting Job Seekers Allowance you should be given a P45 by the Job Centre, which your employer should be given. If not, then you will probably have to complete a P46 (from your employer) and be taxed on emergency code until a new tax code is provided by HMRC. As your total income for 06-07 is (from what you say) not going to be enough to pay tax at the higher rate, then your emergency tax should not be at that level.