ILR application only for kids

Hello there
My husband and I got ILR through Tier 2, 5 year route in October 2015, we did not apply for kids 7&3 years(born in India) due to shortage of money. Now I am planning to apply for them. My queries are
1 Which form should I use?
2 Should I fill my details to show the income?
3 can I use any settlement checking services?
4 Which documents should I send with the application along with their passports,photos and birth certificates.
Any advice please.
Thank you
Sobha

1. SET(O) under 319J or SET(F) under A277, A280( b ), 299.

Thank you Vinni for the quick response

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