They should be able to check mark void & have that save back to the receipt output table.
Based on the above, I assume that you have a yes/no field in the ReceiptOutput table.
I would create a form bound to the ReceiptOutput table and then in the header section of the form add an unbound combobox (unbound means that combo box does not have a control source). The combo box's row source would be the ReceiptOutput table. You would include the primary key field of the table (hidden) and the receipt number field. Then in the After Update event of the combo box, you would have code similar to the following:
Code:
'clone the form's table/query into a recordset
Dim myrecset As Object
Set myrecset = Me.RecordsetClone.Clone
'find first matching record in the recordset
myrecset.FindFirst "[NameOfThePrimaryKeyFieldInYourReceiptOutputtable]=" & Me![NameOfTheComboBoxInTheHeaderOfTheForm]
'set the form's record to the found record
Me.Bookmark = myrecset.Bookmark