Can I use the oldest unuse pension allowance first? I didn't use any of my pension allowance from 2020/2021, 2021/2022. Both 2020/2021, 2021/2022, I have 40000 pounds pension allowance. This year is 2022/2023, I had fully using my pension allowance 40000 pounds. I want to contribute 30000 more and use my previous unuse pension allowance 2020/2021, 2021/2022. I have unuse allowance 40000 can carry forward from 2020/2021. I also have unuse allowance 40000 can carry forward from 2021/2022. Can I use the unuse allowance from 2020/2021? Because that 40000 allowance will expire on 6th April 2024. If I can, I can I tell HMRC which tax year pension allowance carry forward I had use? Regards, David