How can I fix a problem with an incorrect payment entry amount? I billed a customer 190.80. He sent a check for 190.08. I "Received payment" and recorded 190.80, not noticing the check error. I do not want to go through the hassle of getting a new check for the correct amount. Now, I have the Invoice marked as "Paid." When I try to change the "Receive Payment" to 190.08, QB tells this payment cannot be modified because it has been applied to an invoice. When I try to modify the Invoice (so that the total is 190.08), QB tells me it already has payments against it and cannot be modified. I seem to be in a catch-22. I cannot modify the payment, I cannot modify the invoice. Suggestions by those who know QB and accounting better than I? Obviously, I should have caught the error before entering "Receive Payment" wrongly. But, I did not, and am now in a quandary about getting this fixed so that nothing is left hanging. What is in the "May" water? About 10% of the checks that have come from May billings have been wrongly written. Some are $0.10, others $0.30, others $0.40. I've never had this problem before like this. The invoices were created and sent just like every other month. I'm at a loss to explain why all of a sudden, people cannot write checks for the correct amount. All others, I've caught before getting this far into QB procedures, and I've been able to change the Invoice. This one has gone too far. Thanks for any help.