Required document's for converting from F1 to H4

the instructions to the form has a document list. F-1 to H4 would document your F status and spouse H1 status as...

My husband entered the US w/out inspection in 2004, at that time he was 16 (just turned 16). Does he qualify for DACA?

If he was under the age of 31 as of June 15, 2012 he qualifies.

My husband became a US citizen last month, but I have been receiving cash aid for my daughter that's not his

I'm not sure what cash aid was received to know if getting cash aid will affect your getting Recidency

A Canadian may request TN status at US-Mexico border post.

USCIS is currently processing September 2016 filings in CA and June 2016 on East coast.

When should I get an response on my COS : F1-->H4 + H4EAD (filed on October 2016 mid)

We see some F to H4 COS taking about 4 months the EAD follows in a few days or weeks.

the FBI can provide individuals with an Identity History Summary of a record in the US if any

H1B employees are limited to being employed by and paid through their employer.

Can I apply for OPT extension through employer agent?

Your SEVIS record and I-20 would need to be updated with the new employer 'agent'. Your DSO will advise if acceptable.

Can I apply for H4 Dependent visa for my spouse considering I haven’t started working for my employer and I don’t have paychecks

The spouse of an H1 may file for an H4 at this time with verification of your intended H1 employment.