Publication 5683 VITA/TCE Handbook for Partners and Site Coordinators
QSR 8: Correct Site Identification Number (SIDN)
1025 Publ 5683 (PDF) · 2026-10-03 edition · updated 2026-10-04 · United States
All tax returns prepared by VITA/TCE sites must include the correct site identification number (SIDN). E-file administrators must set tax software defaults to make sure the correct SIDN automatically appears on each tax return. Partners or coordinators should work with their local SPEC territory office to make sure they are using the correct SIDN.
For sites using TaxSlayer, the SIDNs are assigned in the Preparer(s) Setup Menu. TaxSlayer allows the Site Administrator to “Pull from Office”, as this populates the SIDN that is sent from SPEC to TaxSlayer with the software order. If the site is an ad hoc site, then follow the Pro Online Ad Hoc Site set up instructions. For more guidance, refer to the VITA/TCE Springboard.
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