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.
1 Attached to the anterior surface of the xiphoid process are the anterior costoxiphoid ligament and a section of the rectus abdominis muscle. 2  The posterior surface serves as an attachment to the posterior costoxiphoid ligament, transversus thoracis muscle, and diaphragm.reatment for Xiphoid Process Pain. 1  Analgesics and nonsteroidal anti-inflammatory drugs (NSAIDs) are the first line of painkillers that may be given to patients with xiphoid process pain. 2  If it cannot be handled by the first line agents, opioid analgesics may be necessary to decrease the pain.