The notice will provide the tax type from which the overpayment originated and tax type to which it is being applied. This model letter as a legally approved form for a client to use when informing an employee about correcting a wage overpayment.The salary overpayment resulted because . Tax Forms, Work From Home - Local Services Tax and Payroll Expense Tax Information(PDF, 245KB), Important Information for City of Pittsburgh Taxpayers. Tell them that they have "overpaid" you. Then ask them to ring you for details. Students with a current payment plan and a credit balance may amend their payment plan to account for the overpayment.