I received a letter from UPS Health care plan requiering me to prove my wife's and my son's elegibility to receive benifits by submitting our tax returns. If I don't do this by Oct. 15 coverage will be dropped. The letter is dated Sept. 15 but I didn't receive it untill yesterday, Oct. 18. Plus we filed an extention twice and didn't file return untill Oct 15. What do I do now?