Everything we answer on every call.

Depends on how many days you've actually got left. Strictly speaking, the I-539 just needs to be on file before your status runs out — we've gotten people through with under 30 days on the clock. The catch is that the less runway you have, the fewer schools and programs are realistic. If COS is even on your radar, don't sit on it for a week. Half the cases that fall apart fall apart from waiting.