If the IRS hasn't raised any issues about your 2005 tax return by now, it is safe to shred it. Last, you should keep any tax return that includes a claim for deducting worthless securities for seven years. If you've lost or discarded a tax return and later need a copy, don't worry.
Rule 2 in the âApostrophesâ section says, âUse the apostrophe to show possession. Place the apostrophe before the s to show singular possession.â. Since âworldâs biggestâ is singular possessive, you need to use âs regardless of which noun follows it.
1 Do not use an apostrophe in nouns that are plural but not possessive, such as CDs, 1000s, or 1960s. 2  Do not use an apostrophe in any verbs. 3  Apostrophes sometimes show up in verbs that end in-s, such as marks, sees, or finds.