On N-400, should I provide 5 years of info for questions that don't specifically ask for 3 years (married to US Citizen)?

You are correct that five years of information should not apply where an applicant is applying under the three year and not five-year rule for naturalization. However, in most cases, we will have the client provide five years to avoid the possibility of challenge at the time of interview. In some instances where we think that it is warranted, we stop our client’s information at three years with a note that the applicant is applying under the three year rule. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.