We didn't update the tax forms since we hadn't filed yet when we had our interview. If you filed for 2022 and it's easy to bring updated forms with you, it wouldn't hurt (but I don't know if they would require that). Otherwise, just print and bring all the documents you submitted to the NVC (original and translated). I got a job between submitting NVC docs and the interview, so I brought the job offer letter from my employer and they seemed glad to see that. One thing to check is that your ARC number is fully printed on the family relation certificate - mine was only partially there with a bunch of *'s and we had to run across the street to the gov office to print new ones while at the embassy.
For the interview, get there a bit early if you can, bring your embassy appointment letter (the email they send you) to get in, head up to the second floor and check in and wait. They'll give you a list of how they want you to order your documents for the first step. Everything is done right at the second floor counter and the people there are super nice and professional. We were there about an hour and a half, most of which was waiting. They asked my wife a few questions about why we were moving and what our plans for work were, and then we were done. We had our 2 yr old with us, which I think helped get a little sympathy, lol.
Hope that's helpful, let me know if you have any other questions!