First, the state DE 4 does not affect your Federal taxes/withholding only the state taxes. You should compare your state tax refund to last year to see the form DE 4 effects.
If you want to change your federal withholding that is federal form W4. Here is a calculator to help with adjusting that form.
What normally happens because the married withholding rate is less than the single withholding, the married option would be less withholding from your pay and higher year end taxes.
The same concept applies to the federal form as well. Less withholding means bigger take home paychecks but more taxes at year end.
If you want bigger refunds you should select the single option for less take home pay with more state taxes withheld.
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