Hello Tami-Confused,
Thank you so much for joining us! I'm sorry that you have owed these last several years, I know that can be frustrating. The steps you have taken are absolutely perfect steps to reduce your taxable income. Changing your W-4 to single 0 will increase the amount of Federal taxes withheld from your paychecks. With your current check stubs and the pretax deductions, you can always use the TurboTax Caster to see where your tax return may look like. Some also opt to have additional withholding. There is a worksheet on the W4 for Multiple Jobs or Spouse works (Pg 3, Step 2(b) that can help determine if you need to have additional withholding. Here are the links to those mentioned above. Good job for being proactive, and thank you again for participating!
W4: https://www.irs.gov/pub/irs-pdf/fw4.pdf
TaxCaster: https://turbotax.intuit.com/tax-tools/
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