Yes, you should amend if the same amount is included in both the Schedule A and the Schedule E (rental).
Amending is done on Form 1040X. Also, if your
return is accepted, you should not try to amend your return until it has been
fully processed and you have received your refund or your payment has cleared.
Amended returns have to
be printed and filed by mail. It can take the IRS up to 12 weeks or
longer to process them. If you are due a larger refund than on your
original return, your amended return should only show the difference and you
will receive a separate check for it. If you owe money on your amended
return, it will show only the new amount owed, you will have to mail a check
with the return.
How to Amend?
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