Can BNO (5+1) holder voluntarily purchase NIs?

I am a BNO (5+1) holder. I'm 66 years old in September 2023, and I paid the first class 2 national insurance payment in the tax year 202223. Do I still need to pay NIs in 202324? In addition, since I started living in the UK in January 2021, am I eligible to voluntarily purchase national insurance benefits for the missing 9 years? If not, am I eligible for Pension Credit (or General Credit)? Thank you.

Hi,
You will stop paying national insurance once you reach state pension age, any period prior to that date national insurance may be due to be paid if you are self-employed.
If you are self-employed then the national insurance class 2 & 4 due in the 2023/24 tax year depends on your profits within that tax year you reach state pension age.
Regarding the years prior to arriving in the UK, you are unable to pay for these tax years. You will need to discuss any benefit/credits with the Department for Work and Pensions.
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Thankyou.