I need to do the same thing.  The check was lost and the original bill is linked to it and from 12/24.  When I just went to Record a deposit, can you tell me what I would put in the RECEIVED FROM field ? After that I just save it and then go to Write Checks and enter the customer's info and the expense account it's coming from again?  Does the deposit just sit in there until I reconcile?  Sorry if I sound dumb, I just want to make sure I do this correctly.