Payroll deduction for health insurance set up incorrectly as post-tax instead of pre-tax
How can we retroactively modify 2023 W-2 (and the source data) to change a health insurance deduction that was set up incorrectly as post-tax instead of pre-tax. It's easy to change going forward (just create a new pre-tax benefit), but we'll still trying to figure out how to change 2023 historical data that feed into the W-2's. We must somehow reverse and correct the deductions and related taxes for 2023 so W-2s are correct.
