<https://creditboards.com/forums/index.php?/topic/626456-w-4-form-question/#comment-5838662>
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"My company switched from semi-monthly to bi-weekly 10ish years ago, and the gross pay difference per period wasn't material, so the deductions also didn't change by a lot.\n \n\n\n\t \n \n\n\n\tSince I haven't changed companies since the late 1800s, I wasn't even aware there was a new form.  Are you supposed to specify a fixed dollar amount per pay period instead of the number of exemptions?\n \n\n\n\t \n \n\n\n\tIf so, how often can you change the deductions? \n \n\n\n\t \n \n\n\n\tMy employer allows changes every pay period if desired, so I'd probably take an educated guess on the first pay period and then adjust for the second and beyond.  Base your guess on your last pay stub from your former employer and scale it for any salary differences.\n \n\n\n\t \n \n"
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