Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
When you say take some of your pension did you mean pension liberation?
Yes, I am aware of the pension liberation rules, but if you are under 55 the costs of liberation can be horrendous tax wise. You enter the taxable sum liberated at Box 11 on your self assessment tax return.
The tax credit forms are not affected by the level of the pension pot.
HMRC are correct, 75% of the liberated pension is taxable at your marginal rate. What you have chosen to do with your liberated funds is your affair. It does not impinge on your taxation position save for the taxation liability on receipt.
I am so sorry to have to rain on your parade..
Sorry, not in the slightest. What you do with your liberated pension funds is your own affair; sorry to have to be so negative, but that is the reality.