No one here is probably going to have the correct answer for you not really knowing what the company or purpose of the Deposit was. I'm going to *assume* this was someone paying their premium on their Insurance Policy, but there is really no way to be sure at our end.
I'd suggest talking to the principals in the company to find out exactly what this Deposit was and how to categorize it.
At some point you probably also should sit down with their CPA to make sure you fully understand how they want things categorized. Then at tax time you will not be making multiple corrections because they were entered incorrectly.
