How do I close out a client's file and issue a "refund" of their IOLTA funds?

SUGGESTED

I have two clients accounts that I want to close out in Timeslips as their cases are now closed with the firm. Each time I attempt to close the client, I get a notice stating the following:

(I whited out the balances for privacy issues)

There is 1 unbilled open A/R transaction for $2760.00 decreasing the balance.
There are 2 funds accounts with a non-zero balance totaling $3323.52.
There is 1 unbilled open funds transaction for $2760.00 decreasing the balance.
An undoable bill is available. It cannot be cleared unless you reopen the Client. 

OR the other one that says:

There is a funds account with a balance of $1523.90.
An undoable bill is available. It cannot be cleared unless you reopen the Client.

I have looked into their accounts are there are no outstanding invoices. I'm not sure what to do at this point. Further, one of the client's matters had refundable costs that I'd like to be able to note were already refunded to him, but I can't see how or where to do that either....

ANY HELP IS APPRECIATED!!!