How long National Benefit Centers take to schedule interview for I485?

Longer than they used to take. See the USCIS.gov website for processing times

Follow the instructions in the notice

Can I use my EAD card or return it?

The EAD document should be amended to reflect your correct name, however, it is a valid document with a Typo.

Extending my H-1b with an expired passport?

Passports are supposed to be valid 6 months beyond any authorized stay. Try to have the passport issuance expedited.

A petition may be filed by the employer. The merits of the petition shuld be reviewed by the employer's immigration attorney as you may be out of...

Probably, but not definite until you have the notice from USCIS

Is there any way for my daughter to stay?

There is nothing you can do to expedite a priority date if that is the reason for the delay. An employment based petition for resident status if...

In i-797 I had printing mistake in my last name& birthday date.I applied correction at 22nd august.HOw many days it will take?

Wait for the correction to arrive. Did you file for a duplicate or call customer service?

What is the best way to fix my mother's immigration status?

File a petition for your mom. Work with an immigration attorney

H1-B Change of Employer - I9 verification.

You may use any documents that are authorized for the I-9 form. See USCIS.gov Forms I-9 and instructions