Below is information from the OEA website:
The Tax Cuts and Jobs Act, effective the 2018 tax year, suspends the previous deduction for job-related expenses or other miscellaneous itemized deductions that exceeded 2 percent of adjusted gross income.
This suspension includes unreimbursed employee expenses such as union dues. These expenses are no longer deductible. Therefore, the annual “Deductible/Non-Deductible portion of dues” publication will not be produced.
For further information please see your tax preparer or IRS publication 5307.