I am in my 7th year extension.
Can i file for EAD immediately upon filing my I140 & I485?
------------ You can file I-140 I-485, EAD AP at the same time. If I-485 has been filed then file EAD, AP with copy of I-485 receipt and other requirements for EAD and AP
How long does it takes to apply for EAD for the spouse?
---- You can file spouse EAD AP at the same time when spouse I-485 is filed or you can file EAD, AP after you filed Spouse I-485 when you get the I-485 filing receipt from USCIS.I Don’t know your full details if you filed I-485 for you and spouse, if not filed file EAD AP with I-485 filing
** try to maintain H1 and H4 status till your I-140 gets approved, you can also file 8th year H1, H4 extension