1. On my H-1B visa, my last day of employment was date X, but my last paycheck was until date Y but this paycheck was for Severance pay. So, my H-1B 60-day grace period has started from date X or date Y?
2. Is it mandatory to have health insurance during H-1B 60-day grace period or beyond, and would it affect status or future visa/immigration if failed to get health insurance for some time?
3. If H-1B change of employer is filed during H-1B 60-day grace period, but during this transfer process 60-day grace period is ended, then is it legal to stay in the U.S. during this period while H-1B change of employer is in process? Or is there a way to stay in U.S. during that period?
The grace period begins after the last pay period covered by the paycheck, not the last date of employment. Health insurance is not mandatory during the grace period, but COBRA (Consolidated Omnibus Budget Reconciliation Act) protection is an option. If an H-1B change of employer is filed during the grace period and ends, it is legal to stay in the US, and you can start working once the USCIS receives the papers within 60 days.