I want to amend my 2016 return filed online but I don't see the 'Amend(change) 2016 return' option under my Tax Timeline as suggested in the instructions?

When I try to click on Amend my return' under 2016 taxes, it gives me the following message: 

It looks like you missed the deadline to add a state or amend your return online using TurboTax.

But don't worry! We can still help you amend a return or add a state on your desktop. Downloading the software or getting it on a CD is an easy way to fix your return using TurboTax software.