AyaE:
NPC means national population census abi commission. I'm not sure. I know it costs about 13k and it gets ready after 2weeks. That's what I submitted as proof of relationship between my mum and sponsor. Also for marriage certificate (since my mum lost hers).

You don't seem to have a lot of 'potentially risky' documents. That's good since you want to change the age. I wish you all the best. Also, proving your 7year gap year is not a problem. You were in school at that time so it covers for it.
All the best!

Thanks for the response i so much appreciate it .
I don’t have int’l passport ,never done it before , reason is because I know this kind of problem will surface in the......]