After you file

I have tried following the instructions for amending.

I cannot find the option "Your tax return & documents"  where it indicates I should on this page:

https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577

When I go to the home page and select "Previous Taxes" and make sure it is "2018" I select "Amend taxes" it tells me I cannot because it is after 10/15.

The "Learn More" page does not help me at all.