The new W-4 forms has no "claiming zero" any longer so it depends on many factors ... like does your spouse work? Did you enter the kids on step 3 ? Did you enter anything else in step 4? The new form is designed to get your bottom line on the 1040 as close to zero as possible.
If you want the most withheld then you should choose SINGLE filing status and leave the rest of the form blank. https://www.irs.gov/forms-pubs/about-form-w-4
Use the Tax Withholding Estimator on the IRS web site to figure out what you and your spouse should each put on the W-4 forms that you give to your employers. It's much easier than using the worksheets on the form. It will let you adjust your withholding to get the approximate refund amount that you want.
Tax Withholding Estimator
