Hello Vitan,
How did you set up the AFLAC contribution? Was it set up as Pre-tax Health Insurance or Taxable Health Insurance?
For pre-tax deduction, it will decrease the amounts in boxes 1, 3, and 5. On the other hand, taxable deduction does not show up on the W-2 form. That's the reason why you can't see the AFLAC contribution from your employees and employers.
This article provides descriptions of the supported pay types and deductions in QuickBooks Online Payroll: Supported Pay Types and Deductions.
Let us know if you have any questions. Thank you!
