Official First Class Envelopes

Window envelopes for tax returns and official documents.

  • 1st Class envelopes at lower prices
  • 9″ x 12″ Window envelopes and more
  • Expanding envelopes too

1st Class Envelope
with Windows

Our Price: $175.00 per 500
Greatland® $224.60 per 500

Order Now

6×9 Window Envelopes
Self-Adhesive

Our Price: $185.00 per 500
Greatland® $224.60 per 500

Order Now

Easy, professional mailing of tax returns and important documents with first class window envelopes. Shop easy, ship fast!

Double Window First Class Envelopes

  • Large First Class Envelope Double Windows in the Center for address cover sheets PES45 PEO41 - Discount Tax Forms

    Double, Center Windows First Class Mail Envelope

  • Fist Class Mail Envelope, also compatible with CCH Prosystem software - Discount Tax Forms

    First Class Mail Envelope with Offset Windows

  • First Class Mail Envelopes Landscape Double Window Blue PER44 PEY51 - Discount Tax Forms

    First Class Envelope, Landscape Style with Double Windows

  • First Class Mail Envelope Blue Double Alternate Windows 9.5 x 12 PEQ43 - DIscount Tax Forms

    First Class Mail Envelope, Portrait Style with Alternate Windows

  • First Class Mail Envelope 9x12 with Top Double Window PEU21 PEL12 - Discount Tax Forms

    First Class Mail Envelope with 2 Top Windows

  • Stars and Stripes Tax Envelope with 2 Windows to display mailing address from a cover sheet PEN40 - Discount Tax Forms

    Stars & Stripes Tax Envelope – Double Window

  • First Class Envelopes 10x13 with Alternate, Offset Double Windows PEB02 - Discount Tax Forms

    10×13 First Class Mail Envelope with Alternate Double Windows

  • First Class Envelope Landscape Style with 2 Windows, Green PEP16 - Discount Tax Forms

    First Class Mail Envelope, Landscape Style with 2 Windows – Green

  • Blank Large Mailing Envelope with Double Windows PET46 - Discount Tax Forms

    Blank Envelope – Portrait Style with Double Window

  • First Class Mail Envelope Double Windows PEG33 PEF32 - Discount Tax Forms

    Large First Class Mail Envelope, Landscape Style with Alternate Windows

  • Large Window Envelope in Landscape (Horizontal) Format with First Class Mail Graphics PEM13 - Discount Tax Forms

    Large Landscape Envelope with Double Windows

  • First Class Envelope with 2 Windows, Landscape Format. Compatible with ProSeries PED30-ENV400 - Discount Tax Forms

    First Class Envelope, Landscape Style with 2 Windows

  • First Class Mail Envelope, Portrait Style with 2 Windows in the Center Blue PEO15 - Discount Tax Forms

    First Class Mail Envelope with 2 Center Windows – Blue

  • First Class Mail Envelope with 2 Windows, 6x9 size. Compatible with Proseries and TaxWise ENV300 PEC03 PECS3 - Discount Tax Forms

    First Class Mail Envelope – 6 x 9

  • Large First Class Mail Envelope 9.5 x 11.5 with 2 Windows V2 Lanscape format PEN14 - Discount Tax Forms

    Large Landscape Envelope with Double Windows V2

  • First Class Mail Envelope 9.5 x 11.5 Portrait Style with 2 Windows PEZ52 - Discount Tax Forms

    First Class Envelope Portrait Style with 2 Windows – Green

  • First Class Envelope 9.5 x 11.5 for Mailing Tax Returns. Landscape style with 2 windows, compatible with Drake software - DiscountTaxForms.com

    First Class Mail Envelope, Landscape style with Alternate Windows – 9-1/2 x 11-1/2

  • First Class Mail Envelope Landscape format with 2 windows 9.5 x 11.5. Also compatible with TaxWise software. PER18 - Discount Tax Forms

    First Class Mail Envelope, Landscape Style with Double Windows

  • Expanding First Class Mail Envelope with Alternate Windows Tyvek. Compatible with Creative Solutions, UltraTax, ATX, CCH and Prosystem software.

    Expanding Envelope with Alternate Windows – Tyvek

  • Blank 9-1/2 x 12-inch double window envelope for tax returns, opens on long edge - DiscountTaxForms.com

    Blank Envelope with Alternate, Double Windows

Single Window First Class Envelopes

  • First Class Envelope Center Single Window PEP42 PEL38 - Discount Tax Forms

    First Class Envelope – Portrait Style with Center, Single Window

  • Tax Return Envelopes with 1040 Window for mailing client tax returns - CLNT9F - DiscountTaxForms.com

    Income Tax Return Envelope with 1040 Window

  • First Class Mail Envelope 9.5 x 11.5 with 1 Window in the Center, Blue PEQ17 - Discount Tax Forms

    First Class Envelope – Portrait Style with 1 Window

  • Large Tax Envelopes for 1040 Form mailing by CPAs and accountants - DiscountTaxForms.com

    Stars & Stripes Tax Envelope – Single Window

  • First Class Mail Envelope with 1 Window 9.5 x 11.5 Green. Compatible with Lacerte software. PEH34 - Discount Tax Forms

    First Class Envelope – Portrait Style with Single Window, Green

  • Patriotic Tax Envelope with Window for easy, official mailing PEB28 - Discount Tax Forms

    Patriotic Tax Envelope with Window

  • Tax Return Envelope with Window makes it easy to deliver tax returns professionally - PES19 PEY19 - Discount Tax Forms

    Important Tax Information Envelope with Window

  • First Class Mail Envelope 9.5 x 11.5" with Single Window PEW23 PEC29 - Discount Tax Forms

    Single Window, Portrait Style First Class Mail Envelope

  • Single Window Landscape First Class Envelope for easy mailing of tax returns or important documents PEM39 - Discount Tax Forms

    Landscape Single Window First Class Mail Envelope

  • Single Window First Class Mail Envelope, Green PEI35 - Discount Tax Forms

    First Class Mail Envelope, Portrait with Single Center Window, Green

Software-Compatible Tax Envelopes