Don't want to owe taxes

Try the IRS calculator:

https://www.irs.gov/individuals/tax-withholding-estimator

The best way to understand your tax situation and have a proper W-4 is to utilize the IRS Tool Estimator.  This will allow you to understand your tax situation as a whole.  This will be helpful to add any additional tax situation you have outside your job(s).  When you are done using the tool it will give you a recommended amount to assist you in filling out your W-4 to reduce your tax liability.  If you have any other income outside of the withholding to include (self-employment, investment income) you can make quarterly tax deposits to the IRS to cover that income. 

https://www.irs.gov/individuals/tax-withholding-estimator

Thank you @Kat-6224 for being apart of todays event!