When to file 1-485 for wife after N-400 interview

[MrL33]

When can i file an 1-485 for my spouse after my Citizenship interview?

My wife has to adjust her status since she is out of status,and i an scheduled for my citizenship interview soon.

Do i apply for her immediately after i am approved or do i have to wait for the OATH DATE?
Is there a citizenship approval notice i can use before the oath date.

Thanks