I am a college student with only $2295 in income and it shows I owe $324. Didn't think I earned enough to be taxed. Is there a minimum income level before being taxed?

What was the source of the income?   Did you work as an independent contractor?   Was the income on a 1099NEC?    Or on a W-2?

Q.  Is there a minimum income level before being taxed?

A. Yes, but it depends on the source of the income. Taxation starts at:

1.  Wages, salaries, taxable scholarship at  $12,550 (2021)

2. Unearned income (interest, dividends, capital gains, unemployment, taxable portion of 529 distribution) at $1100.

3. Household employee income (e.g. baby sitting, lawn mowing) over $2300 ($12,550 if under age 18)

4. Other self employment income over $432, including money on a form 1099-NEC. Income tax doesn't start until $12,550, but self employment tax* [equivalent to FICA for employees] starts at $432**. 

Yours is almost certainly #4, since $324 is exactly the amount of self employment tax due on $2295.  Note that the tax appears in line 23 of form 1040, not line 16.

*Although it may be news to you that you “have a business” (and most of the other people who get their first 1099); The IRS considers anything on a form 1099-NEC to be self employment income.  "Self employment tax" is how the self employed pay social security and Medicare tax. 

**The official reporting requirement is $400, but the calculation works out at $432. 

You may not owe income tax, but you may owe self-employment tax (which is the equivalent of social security and medicare that regular employees have deducted).  The SE tax threshold is $400 of net profit from self-employment (gross income minus expenses).

If you are self-employed you will have a schedule C schedule SE which calculates the SE tax.