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.
Discussions By Condition: I cannot get a diagnosis. sternum and/or xiphoid process inflammation- HELP!! Posted In: I cannot get a diagnosis. I searched everywhere to see what organ/bone/muscle is in the area affecting me, and found that it might be xiphoid process. There are times it takes my breath away as it seems to swell. Most of the time it worsens after eating or late in the day.