The course you paid as an
employee is a job-related expense.
Up to tax year 2017,
job-related expenses are deductible as an itemized deduction subject to the 2%
of AGI floor.
Under the Tax Cuts and Jobs Act, the itemized deductions for job-related expenses subject to the 2% of
AGI floor are suspended for expenses incurred after December 31, 2017 through
2025.
Therefore, your
summer course is no longer deductible for tax year 2018.