We are currently in India. Our dropbox appointment was in early March and our passports were returned with white 221G (asking us to attend interview). We can walk-in as soon as consulates open. We do not require a new appointment as per 221-G document. Meanwhile, my firm has applied for my H1B extension and we are anticipating approval soon. Once approved, I will get a new I-797 with consular process. Assuming that I will receive extension approval by the time consulates open, do I need to submit a new DS 160 when I walk-in for my interview?