Good idea Brenda. I just did a search for "writing to the FDA". Here is what I found so far. I am still checking and might find more later.
http://www.fda.gov/AboutFDA/ContactFDA/default.htm
Please see the left side bar, right side bar, middle employee directory, FDA centers and offices and other information you might be interested in searching.
Even if the TDM1 decision is a done deal we may wish to comment on it as consumers of health care. It might be good for the FDA to hear from consumers once in awhile since FDA decisions may affect our health care. I do not think this is political. The FDA is an agency that is supposed to advocate for us as consumers by checking the safety of the products we use and the medicines we take.