When you travel abroad in this situation, to re-enter the US you will need your unexpired passport, your expired green card, and the I-797 Notice...

How long takes Application to remove conditions of Green Card based on marriage?

The processing times have increased significantly. At least 18 months or so is a safe bet.

Eligible to adjust status through I-485?

This answer above is correct. The answer is "yes".

Can a b1 visa holder get residency by marring a green card holder?

The answer to this question is a bit more complicated than can be quickly answered in this forum. Getting a consultation with an immigration lawyer...

Change of status-process?

If you are filing for a change of status (COS) within the US, then you need the form I-539 and supporting documents showing your ability to support...

Does being a student count as "employment" when filing for marriage based AoS?

Don't skip section without providing some type of information. Enter "Student" and provide datesof study and educational institutions

I filed a I130 petition for my husband back in March of 2018 and still no approval or denial?

Transfer notices have become a periodical feature in our practice. We just received a four of them today.

Question regarding the affidavit validity?

There is no validity period for an Affidavit such as this one.

H1B transfer petition approved but last name is misspelled ? What are the options to update it ?

Your attorney can request the spelling correction. No amendment is necessary.

How long will it take to become a citizen if my nephew gets marry with green card holder?

A green card holder (wife) can petition for a spouse but it may take a few years before a visa number is available for your nephew to immigrate to...