need help bank

Hi,
I am moving to states on TN Visa
Can I keep my bank accouts and saving accounts, RRSP and TFSA in canada, when I am in states.
I do not have canadian address anymore, how can i maintain these accounts and will this have any effect on taxes
do I need to close any I was told TFSA has to be closed.
do I need to pay taxes in canada for the interest from this accounts, and file returns just for this income-or how do people workaround this stuff, How do I maintain this money, .can I tranfer to US bank, will there be issue if amount is more or is there a limit we can transfer.
Please advise
thanks

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