View full size image. How long a healthy pregnancy lasts can vary by as much as five weeks, even when doctors precisely determined the date of conception, a new study suggests.
Exemptions for dependents. You can usually claim an exemption for each of your dependents. A dependent is either your child or a relative who meets a set of tests. You can't claim your spouse as a dependent. You must list the Social Security number of each dependent you claim on your tax return.
Permissible exemptions. On their W-4, your employees can claim a withholding exemption for themselves, and for a spouse if the spouse is not claiming his or her own exemption on the spouse's W-4. An employee can also claim one exemption for each child or other dependent claimed on his or her tax return.