DES will send you a form letter called a Determination of Overpayment. This letter specifies the weeks and amount that DES alleges you were overpaid.Gov or fax it to (602) 532-5564. If needing to amend a withholding form, check Box A, "Amended Return" and complete the form using your corrected withholding information. This form must be completed for notification of a change of employer. Rather, the letter indicates that the collection cannot be made "from final pay. " This statement in the letter is partially correct.