How do EFINs work at a VITA site ?
An EFIN (Electronic FiIing Identification Number) is a number provided by the IRS to identify the site from which Electronic Tax Returns are filed. The same EFIN can be used for several computers in a site or sometimes even in multiple sites. However, an EFIN should use only ONE transmitting computer for sending the Tax Returns to the IRS through UTS. Though there is no technical restriction to transmitting from multiple computers for the same EFIN, the practical logistics of managing it may cause difficulties. UTS/IRS uses the EFIN number to send messages when a transmitting computer connects. If two computers A & B transmit with the same EFIN number, the acknowledgements and messages for the E-files transmitted from computer A may go to computer B when computer B connects. If the same person transmits from Computer A and Computer B, this may not be a problem. However, if different people transmit from the two computers, the transmitter from computer A may wonder why the Acknowledgeme
