Returns download metadata for a succeeded tax package.

By default, the response is JSON containing a short-lived download URL for the generated ZIP archive. The response includes:

• download_url — a presigned URL to download the tax package ZIP file.
• extension — the file extension (zip).
• content_type — the MIME type of the artifact (application/zip).

The archive contains one PDF per requested employee tax statement and one PDF per requested company filing. When the package includes at least one employee tax statement, it also contains a CSV named {tax_package_id}_employee_tax_statements.csv, with one row per requested employee tax statement, covering every box on the W-2. A package of company filings alone has no CSV. See the Tax Packages guide for details.

Use an Accept: application/pdf request header to download a single employee tax statement directly as a PDF. PDF downloads are available only when the tax package contains exactly one employee tax statement and no filings.