Employment records and payroll recording 7.  

Until what date must an employer retain the following documents?

1. W-2s issued to employees for 2020
2. A 2019 Form 940 filed on January 31, 2020
3. A former employee’s 2017 W-2 that had been returned as undeliverable
4. A W-4 submitted on March 7, 2019
5. Employment applications
6. A cancelled check remitting payroll taxes for September 2014
7. An I-9 for an employee hired September 6, 2017 who quit December 4, 2019
8. An I-9 for an employee hired March 11, 2019 and fired November 11, 2020