What w-4 filing should I be at so I don't owe taxes every year?

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We can help you change your withholdings for tax year 2017 by filling out a W-4:

1. Open (continue) your return in TurboTax.
2. In the search box, search for W-4 or W4 (lower-case works too) and then click the "Jump to" link in the search results.
3. Answer Yes when asked if you want to adjust your withholdings and follow the onscreen instructions.
4. When you get ready to file, we'll provide instructions for printing out your W-4. Give it to your employer and keep a copy for yourself.

See How do I change my future paycheck withholdings?

https://ttlc.intuit.com/questions/1901003-how-do-i-change-my-future-paycheck-withholdings