Adding opposite balance with different account number

[carterfleming]

Trying to create the flipside of a row with a different account number for a journal entry. See screenshots for example. 

Desired state:

 

Current state:

 

[cmcclellan]

How do you know what the second Account should be?

[carterfleming]

It's fixed. It'll be the same every time

[nagakavyasri]

try this: