Hello. In December 2023 I recieved a lump sum from my local govt pension but tax was not deducted. I have put some money aside to pay the taxes due. How do I pay? I thought I could simply do a self-assessment tax return, but that would tax me on 100% of the lump sum, not tax me on just 75% of the lump sum, which I believe it should be. Also, a self assessment tax return then expects me to pay tax in advance for next year, but I will not be getting another lump sum. I am not being taxed on my monthly pension payments either. However, other employment is being taxed through PAYE. Any suggestions, please? Thank you.