How to reverse a deposit on a sales order in SIMS

The reversal of deposit on a cancelled sales order is a two-step process in SIMS. This is how you can do this:

Zeroise the deposit from the Sales Order using the Change Client Deposit button. Reset to 0. This "reverses" it from SIMS.
Select the Client from SFM and post an Adjustment Debit on this account to reverse it from the Sales Account.