IRS Number Classification number given to various classes of excise or special tax liability. (Lubricating oil, IRS 63; Retail Liquor…
Inventory Validation List (IVL) A list of accounts currently on the AIMS data base. The purpose of validating inventory is…
Invalid Segment That part of the Individual Master File that contains Social Security Numbers or names that do not match…
Invalid Number Taxpayer’s name and Social Security Number do not agree with the SSN furnished or do not match Social…
Integrated Data Retrieval System (IDRS) A computer system with the capability to instantaneously retrieve or update stored information. IDRS works…
Installment Agreement Record A record in IDRS containing installment agreement information. Integrated Data Retrieval System (IDRS) - A computer system…
Installment Agreement Record A record in IDRS containing installment agreement information
Input Document Those documents which contain information to be fed into the computer, such as tax returns and posting vouchers.