Probably not for you. TN is more flexible since it doesn't come with 6-year limit like H1B. For many employment based green card(GC) applications, it's a 3-step process that consists of Labour Certificate(LC), I-140, and I-485. There is no conflict to apply for LC when you hold/renew TN. It's probably also ok to apply for I-140 when you have TN. However, you can't renew TN after you I-485, which is last step of GC application. You need to have H1B or EAD at that time.
2.當我換工作時, H1 和 TN 是不是都要重新申請? H1 將占用新公司的名額嗎? 我知道TN 申請很簡單,隻要拿offer,在邊境簽即可.
Yes.
3. 關於TN 的renew,我可以austin辦嗎?
I believe so. However, my info is quite old (a few years back.) You'd better to check it with reliable source.
border 是指有美國海關的機場或邊境關口嗎?
Yes.
我這裏離墨西哥近,到那個邊境可以嗎?
Not sure.
4.如果他們幫我申請H1,我要自己負擔費用,我是否該比較一下H1的費用和TN 的renew(包括交通費)?
多謝了先!
You are welcome.