Did you call 1-800 375 5283 or a direct line to TSC? If latter, what is the TSC #? I called the 800 275 5283 two weeks ago and was told 3/10 deadline.
If you have the TSC # and would like to share, I can call that # and check if the 4/30 is a general answer to everybody or special to individual case.
Good luck!