I just went back to the N400 instructions and apparently they changed as of April 1, 2024. They used to have a long list of evidence to bring to the interview (tax info, divorce decrees, etc.), but the new instructions pepper that verbiage throughout (how nice). Anyway, if you are including tax information, or other items even under the 5 yr rule you can upload it in the additional information section. Not sure why it is asking about child support, does she have children from a previous relationship.