How you fill out Form W-4 determines how much your employer withholds for taxes. You need to get it right so you don’t end up ...

Some employers will also ask you to complete a new form W-4 at the beginning of each year. You may also, on your own, want to fill out a new form W-4 when your personal or financial situation changes.

If you are lucky enough to file one of the simpler versions of this form (1040-EZ or 1040A), then some of these issues may not apply to you, or they may be reported on a different line on your tax ...