After you file

IRS now allows e-Filing of Form  1040-X (for the current tax season).

How's that for 21st  Century !!

 

You can't e-File after the e-File window closes.

 

All this should inform you - don't file an incorrect tax return.

IRS employs special contractors to fabricate replacement parts for their computers that are manufacturer discontinued. Fortunately, software doesn't wear out.