SusanY1
Expert Alumni

Get your taxes done using TurboTax

The PO Box is the preferred address for Form 3520.  However, private delivery services will not all deliver to USPS post office boxes.

 For filers who cannot send to a USPS PO Box or wish to use a courier service (UPS, DHL, etc.) they will use the street address provided above.  

@Darenl  

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