The deduction from gross income (no itemizing required) for tuition and fees expired at the end of 2017. However, there is still some hope that it may be extended retroactively for 2018. And there is some talk that it will also be extended for 2019. If so, information will appear on jklasser.com.
Generally, an unmarried person who maintains a household for dependents and is allowed to compute his or her tax based on head of household rates, which are more favorable than single person rates.