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26 CFR 601.401 - Employment taxes. - Cornell Law School
Under the Railroad Retirement Tax Act, the return required of the employer is on Form CT-1, and the return required of each employee representative is on Form
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2024 Instructions for Form CT-1
They tell you who must file Form CT-1, how to complete it line by line, and when and where to file it. Use Form CT-1 to report taxes imposed by the RRTA.
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Form 945-A (Rev. October 2017)
You must complete this form if youre a semiweekly schedule depositor or became one because your accumulated tax liability during any month was. $100,000 or more. Show tax liability here, not deposits. (The IRS gets deposit data from electronic funds transfers.) Dont change your current year tax.
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