It's best to create a new G/L account for a new bank account.  

You will be able to make the old account inactive after two year ends.

RandyW: yes, I'd probably create a new G/L account for the new bank account, and with that, I'd start account reconciliation as one would for any account presumably?

With regards to making an old account inactive, is the two-year rule something Sage 50 puts into their system? That is, does Sage 50  prevent one from designating an account as inactive until it counts two year ends?

When I looked up this up in Sage 50's HELP, I get this (see embedded screen capture below):

So if I understand correctly, when I create the new G/L, I will need to link to this account under

Setup --> Settings --> Payables --> Linked Accounts --> Principal Bank Account --> new G/L

And then also do the same for Receivables.

My question then is: the embedded screen capture above suggests changing the linked account BEFORE performing the last account rec. However, I would have thought it'd be better to perform the final account rec prior to changing the linked accounts? Are you able to make any suggestions around that perchance?

Thanks for your reply, RandyW!