National Insurance - self-employed, reached state pension ag

[clockworks]

I've been self-employed for quite a few years, and qualified for my state pension in May last year. I'm drawing the pension, and still working.

When I do my tax return for 23/24, will I have to pay NI for the whole tax year, or just the period from April 6th until my birthday?

[clockworks]

I found the answer once I worked out what to type into Google:

Class 2 NI stops at 66th birthday
Class 4 NI stops at the the end of the tax year