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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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