How can I make one bank acount of my choosing open when I open Check Register?

Hi @teeljohn,

Once you have the Check Register or the Use Register window open, you simply need to click the drop-down menu. You can then select a different bank account on the list that appears. 

Here's how:

1. Go to the Banking menu.
2. Select Use Register.
3. Click the Select Account drop-down menu.
4. Choose the bank account you want. 
5. Hit OK when done.

In case you mean something else, and you want to connect your bank to QuickBooks instead, then check out this article: Set up account for Bank Feeds.

I'll be around in case you need further assistance. Don't hesitate the leave a comment below, and I'll make sure to get back to you.

There are at least couple of ways:

1) Open your chart of accounts and double-click the account you want.

2) When you have a register window open, choose View | Add "[account name]" to Icon Bar.  Then after adding it, click that button and that register will always open.