Unfortunately, there is no way to amend your return a second time using the same .tax file. You will need to create a 2nd 2013 tax return and make it exactly match what your return said after it was amended the first time.
After you have re-created your 2013 amended return, you will be able to amend it.
If you need them, we have instructions on amending in the following FAQ.
How to amend a return you
already filed
