Edit Contracts, Tax, and Banking details Can I edit or change/remove details in Contracts, Tax, and Banking ?

I have feel up the information in Contracts, Tax, and Banking section for the Bank details.Now contract's status is Contracts In Effect but I want to know that can I delete the bank info OR say disable, remove this contract from itunes. 

I want to register my new bank account.

If so then when ?
Yes, you can edit your information in almost all instances without needing Apple's help.

Worst case, if you are locked out for more than a long weekend, open a ticket with Developer Support and you should have help to clear up your issues.