Family Based Green Card for my father (IR5) NVC Mumbai

[KPR136]

Hi,
I'm new to Immihelp. Thank you all in advance for helping.

I have applied for a Family Based Green Card for my father (IR5) with PRIORITY DATE: 28-MAR-2019. I received a Notice regarding my Immigrant Visa Case becoming Documentarily Qualified on September 27, 2021. The current status is showing that currently at NVC Mumbai. I am waiting for the interview letter to be sent since Sep 2021. I did not get any mail from NVC yet. Am I missing anything? Am I supposed to pay fees and Complete DS-260 prior to receiving the interview letter from NVC? Please help.

[KPR136]

We have already completed DS-260. NVC sent an email for the interview appointment. Could you please suggest what are our next steps? I have already completed the affidavit of support online and paid the fee online.

[KPR136]

Should I upload recent income tax statements online or give them to my father so that he can take them with him during the interview?