After you file

Is your tax return wrong?  How much is on 1040 line 1 wages?  If it's wrong the IRS probably won't catch that.  You will need to amend to take off the duplicate.  Oh, you said the IRS transcript shows 4 W2s?  If your 1040 return is right then just wait and see if the IRS send you a letter or bill.  Then you can explain it.