Hello there,
Unfortunately you cannot
cancel or amend an extension. Only tax returns that have already been
received by the government can be amended. An extension is just a tax
form; Form 4868 to be exact.
If you e-filed your extension and it
gets rejected, you can make your changes before you resubmit it or mail
it in. However, once it's been mailed or accepted, it can no longer be
changed.
** Don't worry if you think you may have over- or
underestimated your tax on the extension; the government doesn't expect
you to get it right down to the dollar. In fact, the IRS instructions on
Form 4868 say:
Make your estimate as accurate as you can with the information you
have. If we later find that the estimate was not reasonable, the
extension will be null and void.
I hope this was helpful and thanks again for being apart of the TurboTax family!
