Yes, it is generally legal to stay in the U.S. after filing a marriage-based green card application, especially if you have submitted an Adjustment of Status (Form I-485) while already in the U.S. Once your adjustment of status application is filed, you enter a period known as “authorized stay,” which means you can legally remain in the country while your case is processed. During this time, you should avoid leaving the U.S. without first getting Advance Parole (Form I-131), as leaving without it could result in your green card application being considered abandoned.
If you have overstayed a visa or entered without inspection, filing for adjustment of status may also prevent deportation during the pending process, depending on your specific circumstances.
