For example, a tourist who enters with a B2 visa may want to extend their trip beyond 6 months. He or she will need to file for an extension of stay with USCIS. The extension of stay is necessary to avoid unlawful presence.
How to Apply for an Extension
If you need to apply for an extension of your stay, you must submit a Form I-539 Application to Extend/Change Nonimmigrant Status with the appropriate filing fee and documentation https://www.uscis.gov/i-539. If your spouse and children are applying with you, they must also submit a separate application.
How to Determine the Date my Authorized Stay Expires
You can check the date on the lower right-hand corner of your Form I-94 to determine when your authorized stay expires. You can also check your duration of stay online here: I94 – Official Website (dhs.gov)
