We can't tell you that, it depends on all your circumstances. You can get a blank W-4 and fill it out carefully one time, using all the worksheets for children, itemized deductions, and two-earner couples. The result you get is used to submit a new W-4 at each job (fill out the form once to get the answer, which applies to both of you).
Or, use the IRS withholding calculator.
https://www.irs.gov/individuals/tax-withholding-estimator
