Withholding tables calculate withholding amounts for the income earned on that job only. The tax return is a reconciliation of all income earned from all sources, the calculated tax liability for the total income, offset by the withholding. The difference is either a refund or a balance owed. If you happen to live in NYC or Yonkers, your city tax is also included in this calculation. Therefore, the withholding amount is not a perfect calculation. You cannot change the amount withheld for 2019, as that time has passed. You will have to pay the balance due or see if you are eligible for 2019 contributions to deductible IRA's or HSA's.
To try to avoid the balance due in the future, you can consider increasing your contributions to pretax benefit accounts, such as 401k plans or health savings accounts. You may revise your W-4 to indicate an additional fixed amount in withholding. Or, you may make estimated tax payments throughout the year to the taxing authority, such as the IRS or NYS.
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