The guy (or gal) on the other end was very helpful told me exactly what to fill out and they were very responsive. I would send an email and they would send one right back.TSCA is the Toxic Substances Control Act under EPA. They basically just want to know if you’re bringing chemical stuff into the US. Believe it or not, MDF also falls under that due to the formaldehyde content.
That pocket doesn’t contain anything for TSCA. Just disclaim it aka doesn’t apply. I deal with TSCA daily.
Also... so far I didn't have to pay any customs fees which I'm stoked about. Not sure how I skated by that.. I was expecting at least $50 or so.