How long after you file chapter 7 do you technically start being in debt again?

I should be receiving my discharge letter any day now, and while I haven’t opened any credit cards nor do I plan to anytime soon, I do worry about a toll bill that keeps getting sent. I ended up having to make an amendment because I initially didn’t include it in my debt, but now my bill is a larger amount than what I told them because time has passed. So I guess I have two questions:

1. does the most current amount you give them matter (I never really thought about it too much until now)?
2. at what point do you start accruing new debt?