Visit the link below.

Depending on your state’s voter registration rules, this site can help you.
This is available for 38 states plus the District of Columbia.

Download the National Mail Voter Registration Form. You can fill it out onscreen and print the completed form, or print the blank form and fill it out by hand. Remember to sign the form before mailing it to the location listed for your state.

Find guidance for states and territories with different registration procedures.