Sample i539 Form for H4 extension within USA with biometric appointment. Form i539A required for child. H4 EAD employment information required. i539 online.
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FAQ
How to Fill USCIS i693 Medical Form (For Doctors & Applicants) - USA
Must I provide a form I-797 for my B2 visa for the adjustment of
Change or extend nonimmigrant visa
Application to Extend/Change Nonimmigrant Status