I have been trying to change may linked bank info now for 6 weeks and all I get is the run around. And since I complained 4 weeks ago about the time it was taking, they now claim that my account was not "authorized" and that I need submit docs I submitted last year when I opened this account. Absolute rubbish - resubmitting these docs will generate another 6-8 week delay. Even with the now high interest rates for I-bonds, I would think twice before investing with this terrible organization.