A clinical evaluation of amlexanox oral adhesive pellicles in the treatment of recurrent aphthous stomatitis and comparison with amlexanox oral tablets:a randomized, placebo controlled, blinded, multicenter clinical trial.
In addition to accessing the Form 656 and Form 656-L online, you may obtain it by calling the IRS toll free number 1-800-829-3676 or by visiting your local IRS office. This entry was posted in IRS Tax Advice, Tax News. Bookmark the permalink.
Call IRS Customer Service. Call Customer Service by tapping below if on your phone, or talk to them from your browser. Tap or click to call. Tap or click here to call (800-829-0582); Press 1 for English, then enter extension 652.