The company I work for has been using DBA Classic since 2002.  Originally they had their bank account with Sterling, but now have an account through Compass.  The bank reconciliations have never been done in DBA.
 
I just started working here in April and this is my first time using DBA, so please, bear with me.  I might be asking a simple question, but I have been searching for an answer and have not found one - that's why I'm here.
 
When you pull up the check register to show the Sterling account - a lot of the Compass checks/deposits show up as Sterling transactions.  When you pull up the check register to show the Compass account, obviously a lot of transactions are missing.
 
How can I accurately reconcile these two accounts?  I have not attempted anything in DBA yet, because I have assumed that once I do one reconciliation, my beginning/ending balances (for bank statement purposes) will be saved.
 
Is there any way to go back and change the bank account (for the transactions that should have been posted to Compass but posted to Sterling instead)?

Thank you for such a quick reply!
 
I am quickly learning with DBA to always double check . . .  
 
If I change everything to the correct account under Maintain Database - BKGLCHK, is this the only location or is there any other file that I would also need to correct the information in?