Sorry I was working all day so I didn't have a chance to respond.
To the first comment, I did the calculations based off IRS exchange rates for past years, and my income would have only been 19.4k USD and I paid $2,200 in taxes. Compared to if I had earned that amount in the US, I feel like I got taxed at a higher rate in comparison, so a foreign income tax would wipe any potential amount owed?
So I answered no to the 3 questions on the basis that I was under the impression I wasn't required to file a tax return for 2018 because my residence was less than 31 days, and I was only considered a permanent resident for 13 days. The Canadian government recognized me as a resident for 352 calendar for tax purposes. My Canadian taxes were also messy, having to file 3 times due to them losing them twice and Canada didn't actually issue a notice of assessment till September 2022. (Which I paid the balance, but I'm currently disputing late fees because of their mistakes).
I had no employment for those 13 days, and my social security card showed restricted authorization from a previous visa and wasn't fixed till January (after the holidays and into a new tax year). On my part, I can see now how that could assume ignorance rather than willful avoidance. There's a likelihood I'll have my 2023 return before my interview which I could use as my 5th year, but that doesn't resolve the issue of the 2018 return, or how I answered the N-400 questions.