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    How to Upload Tax Documents

    Who this is for: Accountants who need to upload tax return documents for client review and signature.

    What you’ll learn: How to upload documents, assign document types, and manage your uploaded files.

    Before you begin #

    • You must have a tax return open on the detail page.
    • Prepare your documents in PDF, Word, Excel, or image format (up to 50 MB each).

    Step-by-step instructions #

    Step 1: Open the Documents tab #

    On the tax return detail page, click the Documents tab.

    Documents tab on the tax return detail page

    Step 2: Click Upload Document #

    Click the Upload Document button to open the upload modal.

    Upload Document modal with drag-and-drop area

    Step 3: Select or drag a file #

    Drag a file into the drop zone, or click the drop zone to open the file picker. Supported formats include PDF, Word (.doc, .docx), Excel (.xls, .xlsx), PNG, and JPEG.

    Step 4: Name the document and assign a type #

    After selecting a file:

    • Enter a Document Name (defaults to the file name).
    • Select a Document Type from the dropdown:
    • Form 8879 (E-File Authorization) — The IRS e-filing authorization form.
    • Federal Return — The federal tax return.
    • State Return — A state tax return.
    • Schedule K-1 — For partnership or S-Corp returns.
    • Payment Voucher — Estimated tax payment vouchers.
    • Engagement Letter — Client engagement agreements.
    • Other — Any other supporting document.

    Step 5: Upload the document #

    Click the Upload button. A progress bar shows the upload status.

    Step 6: Download or remove uploaded documents #

    From the Documents tab, you can:

    • Click the download icon to download any document.
    • Click the trash icon to remove a document.

    What happens next #

    After uploading PDF documents, you must configure signature fields on them before you can send the return for signature.

    Troubleshooting #

    • “File Rejected” notification: The file type is not supported or exceeds the 50 MB limit. Convert to a supported format and try again.
    • Upload fails: Check your internet connection and try again. If the problem persists, try a smaller file.

    Related articles #

    Updated on February 19, 2026

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