6c37871c__11_CCP_Installment_Agreements__If_the_reason_box_states_
[And ...] account is not full paid [Then ...] Verify TIN and cross references are correct on IAT file. Provide updated information to IAT administrator. [If the reason box states:] 
No FS2 BD Mods for Primary/Secondary
Internal Revenue Manual - 5.4.11 CCP Installment Agreements