About 20-30 minutes. Total time depends on how many people in the queue before you. Usually you are given a “under consideration” stamp for anywhere from 5-30 days. You go back on the date stamped and get the remaining days.
thanks! So we are on a visa exemption, already extended once, and it expires May 16. If we go to get a covid extension, they give us a Under Consideration stamp and we must return for the covid extension? What happens if it takes longer than May 16?