Does anyone know if IRS Form 1127 can be filed electronically? I didn't find mention on their site either way so I presume not. But considering they're pushing to go paperless nowadays like most....
Form 1127 (updated link) should be filed in paper (with the supporting documents) to the IRS office that has jurisdiction in the area where you live.
From the instructions (see the link above):
File Form 1127 with the Internal Revenue Service (Attn: Advisory Group Manager), for the area where you maintain your legal residence or principal place of business. See Pub. 4235, Collection Advisory Group Addresses, to find the address for your local advisory group.
However, if the tax due is a gift tax reportable on Form 709, send Form 1127 to:
Department of the Treasury
Internal Revenue Service Center
Cincinnati, OH 45999