Rohan qualified for an exemption from withholding in 2022. He also qualifies for an exemption from withholding for 2023. How does he inform his employer?

He can inform his employer by letter of his exemption.

He will complete Step 1 only of Form W-4, Employee's Withholding Certificate.

He will submit Form W-4, Employee's Withholding Certificate, and write "Exempt" on the form in the space below Step 4(c) and complete Steps 1(a), 1(b), and Step 5.

Since he already qualified in 2022, no further action is required on his part.