For 2023 taxes:

Check your last December 2023 paystub which lists your total numbers for tax year 2023. However most employees can no longer deduct union dues on their federal tax return in tax years 2018 through 2025 as a result of the Tax Cuts and Jobs Act (TCJA) that Congress signed into law on December 22, 2017. 

Explanation of IRS Codes: box 12

 HSA info for taxes from IRS   Distributions From an HSA form 1099 SA

1099-SA: HSA disbursements

Are You Missing Out on These Educator Tax Deductions?

Educator Expenses     http://www.irs.gov/taxtopics/tc458.html
If you were an eligible educator in 2022, you can deduct up to $300 of qualified expenses you paid in 2022 as an adjustment to gross income rather than as a miscellaneous itemized deduction. If you and your spouse are filing jointly and both of you were eligible educators, the maximum deduction is $600. However, neither spouse can deduct more than $300 of his or her qualified expenses.

Form W-9

Form W-4

Form CT-W4