H1B change of status to L2

She is on L2 and her H1B this year is approved as a change of status. She is now not currently doing job so we want to know if she can apply change of status again back to L2.

  1. Does this cos has to be applied on October 1 once she attains the status of H1B or this can be applied before as well.

  2. Will there be any impact in future for using this H1B if we apply cos again back to L2?

No, she can apply for COS anytime before that.
Well, it is slightly grey area here…usually, if you get H1B status, then you are counted on cap…if you have not used it and not worked, sometimes, they may question…again, grey area…