[Scoundreller]

> you won't be able to leave the United States from the point you file your I140/I485 until your Advanced Parole document turns up

How long does this take usually?

[ashconnor]

8-18 months according to the USCIS website.

I also forgot to mention that you have to wait 91 days from your last entry before filing the I485 to bypass the single-intention of TN.