Is it OK to apply H4 before H1

gcseeker2002

Registered Users (C)
Folks,
My h1b 7th year extension will be filed between march 9th and 19th because of the 365 day condition for 7th year. My wife's h4 also expires march 19th , but can I apply her h4 extension without my receipt number for h1b just in case to avoid the illegal status, and then when they ask for additional documentation, i will send my h1b filing receipt . Pls advise
Thanks
 
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