What should I send when mailing Amended Return?

I filed my 2024 return in February and already received my refunds. Yesterday, I received a corrected W-2c form and did my amended returns. When I printed out the State return it was 20 pages and the first part is 8 pages, and I need to sign page 7. Do I need to send everything or just the eight pages? (The Fed return is 57 pages!)