Forms Download useful forms here including W-4 and I-9 forms. CT Employers, please note that your employee package should include Federal Form W-4, Connecticut Form CT-W4 and Form I-9. Forms and instructions are included for download below. CT W-4 Form (Employee's Withholding Certificate) Download: ct-w4_employees_withholding_certificate_effective_january_1_2010.pdf CT W-4P Form (Pension Withholding) Download: ct-w4p_2010_withholding_certificate_for_pension_or_annuity_payments.pdf I-9 Form (Employment Eligibility Verification) Download: uscis_i-9_employment_eligibility_verification.pdf W-4 Form (Employee's Withholding Certificate) Download: w-4_2010_employees_withholding_allowance_certificate.pdf W-4P Form (Federal Pension Withholding) Download: w-4p_2010_withholding_certificate_for_pension_or_annuity_payments.pdf W-9 Form (Request for Taxpayer identification number) Download: w-9.pdf