Ok, 

I am using sage 50.. I have been struggling with this for hours.. I even had my accountant come over and help and I still cannot figure it out. 

I accidentally deleted an invoice before the payment which automatically created a credit. 

I have gone through the walkthroughs to adjust it but when I adjust it , the payment does not show when I try and reconcile. I have re-entered the invoice and marked it paid without creating a receipt. Everything is in order except that I am showing a negative amount for the customer and the reconciliation window does not have the payment recorded so I can not balance as its for that exact amount. 

Please help !!