IMPORTANT UPDATE FOR QuickBooks Customers: Intuit is receiving reports of individuals receiving fraudulent emails from QuickBooks or QuickBooks Online. The two separate emails ask customers to either download a plug in to assess their security or download a Digital Certificate. Customers should delete either of these emails. As we discover these fraudulent sites (cyber criminals often use the same email repeatedly, although they change web sites), we take them down.
More at the Intuit website