Change of Address

To change my address with the IRS, I know I must use Form 8822. However, I am confused as to where to mail it once I fill it out. I live in one of the 50 states - Pennsylvania, so according to the instructions cover sheet, I am supposed to send the form where I filed my most recent income tax return. However, I filed my most recent income tax return electronically using TurboTax, so I am confused where to mail Form 8822 to. Does anyone know please? Thanks