6c37871c__11_CCP_Installment_Agreements__If_the_reason_box_states_
[Then ...] Re-input/update ENMOD history. (Primary TP IA, MMIATFCCP input on ENMOD. Secondary TP IA, MMIATFCCP and MMIA4SSSN input to ENMOD. Note: Check account for ST 53. Provide updated information to IAT administrator and request 3856 voucher letter, if appropriate. [If the reason box states:] 
Hist MMIATFCCP Not Found on ENMOD Primary SSN
Internal Revenue Manual - 5.4.11 CCP Installment Agreements