In some cases, they will have a zero balance and in some cases I will write a check returning the remainder of their trust.
This process is a function of QuickBooks. You'll need to zero out the trust liability. This is done by producing a check from the IOLTA account and making it payable to the client. Have a look at the image below. Once the check has been disbursed, you can use the same process as above to archive the client/matter in LeanLaw and QuickBooks.
For wire transfers, follow this QuickBooks Online article.