I need my 2017 State Tax Return

How can I get a copy of my 2017 State Tax Return? There is no option to "add a state" in the 2017 option of the "Your tax returns and documents" drop down box.  Only 2018, so all previous help threads on this subject are useless. When I click go to the print center it only has 2018 state return available. How do I get 2017 state return?