Federal, state, or local laws might require you to send notices to employees regarding their pay. Or, you might voluntarily decide to beef up communications.
Before you spend time searching for just the right words, find out whether the government entity has already done the work for you. For example, in Notice 2021-53, the IRS provided model language employers can use in box 14, or in a separate statement, when preparing W-2s.
Additionally, PayPlus offers an HR product that has sample letters you can use. Your Payroll Specialist can provide more information.