An income tax is a tax imposed on individuals or entities (taxpayers) that varies with the income or profits (taxable income) of the taxpayer. Details vary widely by jurisdiction, hope this helps :)
This sentence would probably be a citation in APA style. Citations on research papers are very important since they give due credit to the original owner of the statement. Statements that don't have citations tells the readers that those statements are of the researcher/s alone which would be a problem for them if found out that it wasn't theirs to begin with. This would result to a work of plagiarism which is a grave sin in constructing research papers and is more equated with the act of stealing.
Joey was out picking up the movies, and Rachel was currently fixing her hair and touching up her makeup. She kept reminding herself that this wasn't a date, but with the mixture of nervousness and excitement coursing through her body, it sure as hell felt like a date.
Answer: yes unless home schooled
Explanation: