Page 1 of the 2021 revision Form CT-1 is shown with all field designators.Top of page has all entity information, including name (01NC), address, RRB number and employer identification number (01EIN).The tax period is in the upper right corner.A check box to the right of entity area asks the TP to check it if this is a final return.Part I: Railroad Retirement TaxesThe following lines are displayed on page 1:Line 1, Tier 1 Employer Tax compensation other than tips and sick pay (field 0201) which generates (Field 021B>).Line 2, Tier 1 Employer Medicare Tax on compensation other than tips and sick pay (field 0202) which generates (Field 0202>).Line 3, Tier 2 Employee tax on compensation other than tips (field 0203) which generates (Field 0203>).Line 4, Tier 1 Employee tax on compensation other than sick pay (field 0204) which generates (Field 0204>).Line 5, Tier 1 Medicare tax on compensation other than sick pay (field 0205) which generates (Field 0205>).Line 6, Tier 1 Employee Additional Medicare Tax on compensation other than sick pay (field 0206), which generates field 0206>.Line 7, Tier 2 Employee tax on compensation (field 0207) which generates (Field 0207>).Line 8 Tier 1 Employer tax on sick pay (field 0208) which generates (field 0208>).Line 9, Tier 1 Employer Medicare tax on sick pay (field 0209) which generates (field 0209>)Line 10, Tier 1 employee tax on sick pay (field 0210) which generates (field 0210>).Line 11, Tier 1 Employee Medicare tax on sick pay (field 0211) which generates (field 0211>).Line 12, Tier 1 Employee Additional Medicare Tax on sick pay (field 0212) which generates field 0212>.Line 13, Total tax based on compensation. No field designator.Line 14, Adjustments to employer and employee taxes (field 02ADJ).Line 15, Total taxes after adjustments. No field designator.Line 16, Nonrefundable credit for sick and family leave wages for leave taken before April 1, 2021. Field 19QCS.Line 17a, Nonrefundable employee retention credit. Field 19CER.Line 17b, Nonrefundable credit for sick and family leave wages for leave after March 31, 2021, and before October 1, 2021. Field 19QAS.Line 17c, Nonrefundable portion of ARP COBRA credit. Field 19CNA.Line 17d, Number of individuals provided COBRA assistance. Field 19CRN.Line 18, Total nonrefundable credits. No field designator.Line 19, Total taxes after adjustments and nonrefundable credits. Field 02TT.Line 20, Total deposits. Field 02DEP.Line 21, reserved for future use.Line 22, reserved for future use.Line 23, Refundable credit for sick and family leave wages for leave taken before April 1, 2021, field 19RCS.Line 24a, Refundable employee retention credit, field 19RER.Line 24b, Refundable credit for sick and family leave wages for leave taken after March 31, 2021, and before October 1, 2021, field 19RAS.Line 24c, Refundable portion of ARP COBRA credit, field 19CRA.Line 25, Total deposits and refundable credits. No field designator.Line 26, Advances from Form 7200, field 19APA.Line 27, Total deposits and refundable credits less advances. No field designator.Line 28, Balance due (field 02B/R).Line 29, Overpayment (field 02B/R)Below and to the right of line 29 are check boxes for Apply to next return and Send a refund. Field designator is 01ARN.If applicable, Computer Condition Codes (Field 01CCC) are edited in the bottom-center of the page. Any action codes edited by Code & Edit will be in the bottom left margin.If applicable, the received date will be stamped or edited in the center of the form.