Processing the check is IRS's responsibility. If they accepted your check, but do not process it, it is their fault. Once they accept your check, your end of the deal has ended. A while back, I got a notice that I did not pay my state tax.
1 The xiphoid process (Latin: processes xiphoideus) is a small triangular cartilaginous extension of the breastbone.
Answer by Answers Publisher. Confidence votes 318K. The xiphoid process enlarges during adulthood because it isn't truely set in sized until your early adulthood, early to mid thirties. It is normal to feel discomfort in this area, but it should go away after awhile.