Handle electronic filing and upload for 2026 1099 reporting through the 1099 PRO 2026 ENTERPRISE upgrade. This upgrade carries a 5,000-transaction capacity, giving organizations a defined volume for electronic submission work. Its Enterprise designation, 2026 reporting-year focus, and electronic filing/upload scope identify the functional requirement without adding unrelated tax or document-management functions. EU-26-S is an upgrade designation rather than a full software deployment description. It fits environments where the required function is electronic filing/upload in the 1099 PRO 2026 ENTERPRISE environment and expected activity fits 5,000 transactions. Match the upgrade type, reporting year, edition, and transaction capacity to the existing environment before selection. Those four terms determine whether its scope aligns with the intended 1099 workflow. The stated capacity is 5,000 transactions for this 2026 Enterprise electronic filing/upload upgrade. Organizations extending an existing 1099 PRO entitlement can use the edition and capacity markers to distinguish this option from entries with different reporting-year, volume, or workflow scope. Keep the ordering code associated with the 2026 Enterprise electronic filing/upload requirement rather than treating the product name as a broad 1099 software label.