When you run cable through any building you first need to consider plenum spaces. Plenum spaces are the open spaces above the ceiling or below the floor that are used for air circulation. Technically, any ductwork is considered a plenum space too.
Typically there is an allegation. After the allegation, an immediate investigation starts with one of the service specific special investigative agencies (OSI, NCIS, CID or CGIS). The investigation time depends on how serious the allegation is. Investigations can take a week or they can take 18 to 24 months.Our office has seen at least two particularly long investigations. One was 14 months long, and another was over 18 months long.The first case was a financial fraud case, and the second was sexual assault and child pornography.nvestigations can take a week or they can take 18 to 24 months. Our office has seen at least two particularly long investigations. One was 14 months long, and another was over 18 months long.
It is not until you actually do file a return that the audit time limit -- three years -- and collection time limit -- ten years -- starts to run. As a practical matter, however, if you haven't heard from the IRS in six years, you don't need to worry too much about taxes owed on a nonfiled return. The IRS usually doesn't go after nonfilers after six years -- unless the IRS begins its investigation before the six years elapsed and you owe a large amount of taxes. After six years, the IRS frequently purges its computer files.