Tax Year Prior to 2020: I made $12,000 this past year and from what it looks like, I owe over $300 in taxes. is there a tax deduction I can make that I may have missed?

[KarenL2]

If that's the only income, then that does seem a little high. That is,  unless you can be claimed as a dependent on another person's tax return or you have self-employment income (1099-MISC).

You would get a Standard Deduction of $6,300 as a Single person.  Plus, another $4,050 personal exemption (if nobody else can claim you).  The remainder is taxable income.

You might want to go back through the Personal Info area and review your answers to those questions.  Also, verify your W-2 is entered correctly in the Income section.

Also, revisit the Health Insurance area as that may be a factor.

How do I Preview my TurboTax online return before filing?

https://ttlc.intuit.com/replies/3302322