Please advice needed on fees

Hello all,
Please I want to apply for Naturalisation for my self and also register my child, I am a single parent and can't afford both fees at once I.e. Mine and my child's.
Please i will like to know if I can register my child first using MN1 form and then save up money to do mine later or is it a MUST that I do both together? Thanking you all in advance for your responses.

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