Here is what Copilot replied:
Yes, the IRS allows you to e-file your tax return and then mail in Form 8997 separately. If you choose this method, you should send Form 8997 along with Form 8453 to the IRS within three da....
Here is the address for mailing:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX [removed]
