Follow the steps to accurately complete the IRS CT-1 online.

1. Click ‘Get Form’ button to obtain the IRS CT-1 form and open it for editing.
2. In Part I, fill in your name, employer identification number (EIN), address, and Railroad Retirement Board (RRB) number. If this is your final return, check the appropriate box.
3. For Railroad Retirement Taxes, enter the total compensation paid in 2020 for each applicable tax line. Multiply as instructed to calculate the taxes owed and enter those amounts accordingly.
4. Complete the adjustment sections for employer and employee railroad retirement taxes, attaching any required statements as needed.
5. Move on to record any nonrefundable credits for qualified sick and family leave and employee retention credits, then calculate your total nonrefundable credits.
6. Subtract any nonrefundable credits from the total taxes after adjustments to find your total railroad retirement tax liability.
7. If applicable, complete Part II to summarize your monthly railroad retirement tax liability. Ensure total liability matches previously reported totals.
8. Designate any third-party designee if needed and provide their details in the required field.
9. After completing all sections of the form, sign and date it as required.
10. Finally, save any changes made, and choose to download, print, or share the completed form as intended.

Begin filling out your IRS CT-1 form online to ensure timely and accurate reporting.