Follow the steps to fill out the IRS CT-1 form online.

1. Click 'Get Form' button to obtain the form and open it in the editor.
2. Begin with Part I. Enter the name of your business and your Employer Identification Number (EIN) in the designated fields. Provide the business address and, if applicable, the Railroad Retirement Board (RRB) number. Ensure that the details are accurate.
3. Next, report the compensation amounts in lines 1 through 12 corresponding to each tax type (Tier 1 Employer Tax, Medicare Tax, etc.). For each line, indicate the amount of compensation paid and multiply it by the specified tax rate. Enter the calculated tax next to the compensation amount.
4. Calculate the total tax due by adding the amounts from lines 1 through 12 and record the total on line 13. If any adjustments are necessary, follow the instructions for line 14, completing any required statements.
5. Proceed to line 15, where you will record total railroad retirement tax deposits for the year. Compare this amount to the calculated total tax from line 13.
6. If the total tax due (line 15) exceeds the deposits (line 16), report the balance due on the next line. If the deposits exceed the tax due, indicate the overpayment.
7. In the Third Party Designee section, if you authorize someone to discuss your return with the IRS, complete their details including name and phone number. Otherwise, select 'No.'
8. Sign and date the form, ensuring the declaration is accurate. If a paid preparer assists you, their information must also be filled out in the designated area.
9. If applicable, move to Part II to complete the Record of Railroad Retirement Tax Liability. Provide the monthly summary of liability if you are a monthly schedule depositor.
10. Finally, save your changes. You can download or print the completed form. If needed, share the form as required.

Complete your IRS CT-1 filing online today to meet your tax obligations efficiently.