Job change before 180 days of approved I-140

[pg84]

Hi,

I have an approved I-140 from employer A. It just got approved in December 2017. Now I am looking to change jobs and join employer B.
Employer B is willing to sponsor the H1b and start the transfer process immediately. I have some questions regarding the process:
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[davincikode]

Good Day!

I was recently laid off by my employer. I would like to know if i can use the i140 receipt number from this employer to apply for an H4 had for my spouse after joining my new employer. Thanks!