The IRS will accept an amended return up to 3 years after the date you filed the original return or within 2 years after you paid the tax due on the return, whichever is later. You will only need to update the items that need to be amended.
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 do not “catch
up” to your original return and replace them; they are processed as two
separate returns.
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.
You
can check the status of your Form 1040X, Amended U.S. Individual
Income Tax Return,
using the Where's
My Amended Return? online
tool or by calling the toll-free telephone number 866-464-2050 three weeks
after you file your amended return.
Please see the
TurboTax FAQ below for more information.
https://ttlc.intuit.com/replies/5114064
