You may indicate visa overstay or AOS pending.

N400: submitted form and forgot to include important documents.

You should wait until the documents are requested or if not, present this at time of interview.

Not sure what to expect after AOS interview, I am very confused. Would appreciate insights/thoughts

Difficult to say without a review of your case. Generally a decision is mailed within 2-4 weeks of interview so await mailing from USCIS.

May I apply for asylum knowing that my immigration status is still valid for 5 years?

Yes you may do so even if you have valid status at the time of filing. However you must do so within 1 year of your entry or fall under an...

Could the use of fee waiver for N400 affect outcome?

No the use of this waiver does not detrimentally impact the N400 adjudication.

If next March 2020 make five year I have my Greencard ?

4 years and 9 months from the residence since date on your green card. Good luck!

After abandoned green card apply for visitor visa and then again adjust status to green card?

Yes - that cannot be your intention upon their entry. Instead consider consular processing and work with an attorney given previous abandonment.

Can I file a I-485 form for my husband if he is a daca recipient before the age of 18 but entered unlawfully?

Unfortunately he is not adjustment eligible unless he meets an exception or will require a waiver. It would be best to consult with an attorney...

My I 130 has been pending for a year and a half what do i do ?

It can take up to 120 days after an RFE submission. You can schedule an infopass appointment to inquire further at this stage.

Yes if you have had your permanent residency for the past 5 years.