Top loaders will eligible starting Jan. 1, 2018, as long as long as they meet the IMEF/IWF factors.
Rebate amounts will stay the same for 2018. There is an updated IMEF/IWF factor for the rebate (IMEF > 2.76 and IWF < 3.2).
Here is the latest version of the rebate form.
Energy Star certification is no longer a requirement.