Form CT-1X Adjusted Employer's Annual Railroad Retirement Tax Return or Claim for Refund
Instructions for Form CT-1X, Adjusted Employer's Annual Railroad Retirement Tax Return or Claim for Refund

Form 941-X Adjusted Employer's Quarterly Federal Tax Return or Claim for Refund
Instructions for Form 941-X, Adjusted Employer's Quarterly Federal Tax Return or Claim for Refund

Form 941-X (PR) Adjusted Employer's Quarterly Federal Tax Return or Claim for Refund (Puerto Rico Version)
Instructions for Form 941-X (PR), Adjusted Employer's Quarterly Federal Tax Return or Claim for Refund (Puerto Rico Version)

Form 943-X Adjusted Employer's Annual Federal Tax Return for Agricultural Employees or Claim for Refund
Instructions for Form 943-X, Adjusted Employer's Annual Federal Tax Return for Agricultural Employees or Claim for Refund

Form 944-X Adjusted Employer's Annual Federal Tax Return or Claim for Refund
Instructions for Form 944-X, Adjusted Employer's Annual Federal Tax Return or Claim for Refund

Form 944-X (PR) Adjusted Employer's ANNUAL Federal Tax Return or Claim for Refund (Puerto Rican Version)
Instructions for Form 944-X (PR), Adjusted Employer's ANNUAL Federal Tax Return or Claim for Refund (Puerto Rican Version)

Form 945-X Adjusted Annual Return of Withheld Federal Income Tax or Claim for Refund
Instructions for Form 945-X, Adjusted Annual Return of Withheld Federal Income Tax or Claim for Refund

Form 3911 (SP) Taxpayer Statement Regarding Refund (Spanish version)

Form 8862 (SP) Information to Claim Earned Income Credit After Disallowance (Spanish Version)