and be back on the same day or a couple of days later. Are both suited to visa revalidation when they come back into US, that is, they don't need to apply H1 or H4 visa in Canada? The couple changed their visa status from F1/F2 to H1/H4 in US. H1 has an expired H1 visa stamp, and H4 has never had H4 visa stamp.
If any body had the similar experience before, please give me some suggestion.
A bunch of thanks!