Which page do i sign my federal income tax return?

[Kat]

If you're e-filing, you'll electronically sign your return, so no handwritten signature is required.

If you've printed your return to file by mail:

The new Form 1040 consists of 2 half-pages which TurboTax is printing as one page.  You'll see the "Sign Here" spot near the middle of the page.

See screenshot.