我是加拿大公民，現在持有簽證在美國工作，明年可能回加拿大定居：
1）這邊的房子準備賣掉，那就沒有永久的美國地址，那麽銀行賬戶還能keep嗎？-I think so. Update your address to your Canadian address with the bank.
2）SSN是不是就無效了？-SSN is valid for your whole life time, but you may not qualified for some of the social security benefits if you don't live in US permanently.
3）401K和HSA賬戶還能keep嗎？到了退休年齡才能取出？
4）股票賬戶還能繼續持有嗎？還能繼續投錢炒股嗎？
-I am not familiar with these two questions. You may post it to 法律谘詢
