I have a client with a new In-Kind Payment Instrument and we want it to to go to their In-Kin Financial Account. This is not one of the options how/can we do this?
Go to Administer->CiviContribute->Financial Accounts and click on Add Financial Account. You will also need to go to Administer->CiviContribute->Financial Types and set up an In-Kind Financial type to use with your Financial Account.
If I understand you correctly you are looking to set up a new financial type and accounting code.
If so, I suggest that you read this chapter of the book: Contributions - Set up