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Electronic Services Individuals File online using TSC-IND E-file Businesses File online using TSC-BUS File using the Telephone - 860-289-4829 W-2 and 1099 Filing Requirements Electronic Funds Transfer FSET - Fed/State Employment taxes program TPBF - Third party bulk filing International Fuel Tax Agreement - IFTA Practitioners Information for Tax Practitioners Software/Payroll Electronic Filing for Software Developers Software Developers Registration Payroll Companies Registration Printable Version