Here is the sequence of events and status:
Oct 2014 - Came to US with Stamped H4 (I94 & visa valid till 15 Jan 2015)
Nov 2014 - Filed for H4 extension from US (since H1 extension was approved) - Still Pending
10 Jan 2015 - Left to India for personal Reasons
Feb 2015 - Will be going for interview/stamping H4 for re-entering US (since Primary H1 extension is done)
Now a company is filing her H4 to H1B this year.
Now Her probable date of return is in April-2015(H4). Will this affect anything (since H1 won't get approved in April.. Right ?) ?? Is it compulsory to return to US before 31st March. ??