When your print your amended return, your TurboTax filing instructions should show on the print out.
Your filing instructions should give you the correct mailing address for your federal and/or state amendment and also let you know which tax forms, if any, you need to attach.
See Where to mail
-You can also find the federal mailing address from IRS website:
https://www.irs.gov/pub/irs-pdf/i1040x.pdf
page 14 under Where to file
-For states,
check your state tax authority
for information
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
