There are some situations in the IRS tax code that are unable to be e-filed and this is one of them. Filing an amended return by mail is still getting it filed and corrected. Unfortunately, as you know, it will take longer to process it.
The message should also tell you why it cannot be e-filed currently. You need to find out why because if you are just waiting on a form to be changed or updated, then it would be beneficial to wait to file the amended return when you can e-file it.
If you choose to paper file the 1040X, it can take 8-12 weeks or longer to process an amended paper return.
There is now, a link at IRS where you can check the status of your amended return.
Here it is:
Where's My Amended Return
