Chargeable event gain

Hi I invested £150k in a bond 10 yrs ago and made no withdrawals during this time. This year March 2024 I had to withdraw £95k out. I received a chargeable event certificate from the company in March 24, which I forwarded to HMRC. During Dec 24 I received a letter from HMRC informing me that my chargeable event income gain was above £10000, I would now be required to complete a self assessment tax form. My question is what do I have to pay tax on:- 1) Amount of gain arising from this event is £32k 2) Notional tax is £6.5k I am a 20% tax payer with state pension and private pension well below the 40% tax bracket. Is it 20% of the £6.5K and how do I include this on the SAT form as Ive never filled in one before Regards

Hi Davidjl,
Unfortunately, it is not possible to check individual tax records through this forum, if you have a question which relates to your personal tax situation or tax code please contact our helpline:  
Income Tax: general enquiries
On this page you will also see a link to:
Personal tax account: sign in or set up
which may be the quickest way to review information relating to pay and tax history, tax codes and how to change them. 
Alternatively, you may wish to engage the services of a professional advisor/accountant to assist with your enquiry. 
Thank you.