How do I apply for Social Security disability benefits?

You can apply online at the Social Security Website Here.

You can call (800) 772-1213 and arrange to apply at a local office in person or over the phone;

You can appear in person at a local office.  Find your local office using the SSA Office Locator.

There may be some strategic advantages as to which method you use to apply.  You should discuss this with an attorney.