Thanks for the help and quick response!@Amrit1234 please check my responses.
1. Is it necessary to fill 5406..i am confused about this form?
2. If yes, is it means 2 forms need to be sent? One from primary applicant other from spouse.
3. And, form which would be filled by spouse, whose name would be filled at applicant tab? Mine as i am primary applicant or spouse as she is filling on her behalf?