Multiple bank accounts - one business

One company can have as many bank accounts as it wants.

You invoice from the company, not the bank account.

So I am confused as to what you are asking?

Thank you Rustler, got it, I would've thought just adding new banking information to a new invoice would exercise that account.

Which brings me to the second question- for running reports (for myself, and for tax purposes), how do I run a P/L or balance sheet report that includes the transactions from both bank accounts? I was looking at the Parent/Sub in the CoA, which may be set up for this purpose - do I set up a 'top level' parent, and make both bank accounts 'sub' to that one? Or...

thanks for your help!

bank accounts are asset accounts and do not have anything to do with the P&L

The P&L shows income from sales and expenses you pay for.  You may pay an expense from the bank account or you might pay the expense with a credit card - how you pay the expense is not the issue, that you paid the expense is.