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 overpaying or underpaying.

Sometimes you need to sign or fill out PDF forms while you're away from your Mac. Here's how to get that paperwork done on your iPhone or iPad.

In general, you shouldn't be entering any login information or payment details into a Google Forms document (it will start ...