Related Clues:

• W-4 fig.
• The big 4-0, for example
• IRS requirement
• ID with dashes
• Form W-9 datum: Abbr.
• Common form datum: Abbr.
• Word with information, new or old
• Tax ID
• Govt.-issued ID
• ID for the I.R.S.
• Lifelong assignment, briefly?
• Bouncer's concern
• Become ripe
• One form of ID
• Paycheck ID, perhaps