If you gave $2000 in discounts and your total for refund checks and credit memos was $1000, the tax summary shows only the total for discounts:
Returns and allowances 2,000
The Debit column in the QuickZoom report provides the amount for refund checks and credit memos:
Debit
1,000
In this case, the total to report for returns and allowances on your tax form is $3,000.