I was just able to reschedule my interview for Monday.
The website says to bring:
Document Required for Interview:
A copy of your Conditional Approval Notification
For Citizenship of UNITED STATES:
Passport
For Admissibility:
Passport
So that's covered,. and I have my Drivers License for proof of address. Is there anything else I might need to bring? In particular, I'm self employed (sole proprietor - consultant), and indicated that on the application. Are they likely to ask for anything related to that, like tax returns?