Quote Originally Posted by emily_the_spoiled
As long as you currently have a valid visa you should be able to travel between Canada and the US without any problem. The problem will arise once you file for a greencard. When that paper work is "in process" you can not leave the country without a special authorization from the ICE. I ahve been told that getting a greencard for a Canadian takes about a year (if all the paper work is correct the first time).

Good luck with this!
I don't have a valid VISA anymore... the last time I crossed the border (I told them I didn't want to renew it since I was going to start the greencard process) they told me that because I am married to a US citizen and had a VISA ... once that Visa runs out I can stay here in the US while we are getting my papers ready... but I cannot leave to go to Canada and come back in... but the Paralegal said something about an advance parole or something like that... can't remember if that was the name or not. That will allow me to come back across as long as I am back before we start the greencard process. that was why they were going to file a K3 for me in the first place... so that while I was waiting to be able to file for the greencard I could come and go without worrying and I wouldn't have to apply for a work Visa again (apparently having a work visa can sometimes complicate the paper work the way we filed... because we filed for me to come here as a spouse... I don't know why it matters but I guess it does lol so they were going to do the K3 which is a Visa for spouses... you just can't work) but there is no point now since we will be filing for the greencard soon