You should be able to withdraw 25% of your pension tax free, but your pension provider will tax you on payments above this level.
If they don’t hold a current P45, the pension provider will apply an emergency tax code on a month 1/week 1 basis, which could mean you pay too much tax.
You will need these forms to reclaim the tax
Form P50Z – if the client has chosen to empty all their pension pot in one go and they have no other PAYE or pension income (other than the state pension);
Form P53Z – if the client has chosen to empty all their pension pot in one go and they do have other PAYE or pension income other than the state pension;
Form P55 – where the client has taken a lump sum payment which doesn’t use up all of their pension pot, they have only taken a single payment and don’t intend to take further payments in that tax year.