|CMR||Code of Massachusetts Regulations||Used in reference to regulations adopted by the Department of Revenue and other state agencies under statutory authority.|
|CSE||Child Support Enforcement||Division of the Department of Revenue responsible for the administration of the Commonwealth's child support laws.|
|DUA||Massachusetts Department of Unemployment Assistance||Responsible for administering the Commonwealth's employment security laws.|
|DIA||Massachusetts Department of Industrial Accidents||Responsible for administering the Commonwealth's workers' compensation laws.|
|DOR||Massachusetts Department of Revenue||Responsible for administering the Commonwealth's tax laws.|
|EFT||Electronic Funds Transfer||Means of transferring funds from one bank account to another for the purpose of electronically making payments.|
|Federal Identification Number||Used as an organization's or employer's tax identification number on federal and state tax returns The Federal Identification number is sometimes also referred to as a federal employer identification number (FEIN); an employer identification number (EIN); or a business identification number.|
|IRC||Internal Revenue Code||Used in reference to federal tax laws.|
|IRS||United States Internal Revenue Service||Responsible for administering federal tax laws.|
|LLC||Limited Liability Company|
|LLP||Limited Liability Partnership|
|MGL||Massachusetts General Laws||Used in reference to state statutes.|
|PIN||Personal Identification Number|
|SSA||United States Social Security Administration||Responsible for administering the federal social security system.|
|SSN||Social Security number||Used as an individual's personal tax identification number on federal and state tax returns.|
|TIR||Technical Information Release||One of the several types of periodic issuances from the Department of Revenue explaining the Commonwealth's tax laws in detail.|
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