Some jobs require employees to have or use equipment that the employees purchase out of their own pockets. If the company doesn't reimburse for those expenses, some may be deducted on income taxes to help maximize a tax refund.
For example, the subscription costs of professional publications that keep you updated about how to perform your job better can be deducted. The same is true of professional dues, such as those you pay to belong to unions or professional organizations.
In addition, if you use a personal mobile phone for work, then the portion used for work may be deducted. For professional expenses, be sure to consult a professional tax accountant. Some expenses, such as uniforms and travel, may not be deductible.