If you filed your federal tax return electronically and it was rejected for a missing Form 8962, you may need to resubmit your federal tax return with a completed Form 8962 or an explanation for why you are missing the form, and then attach it to the federal return when you refile.  

Learn how to fix it and correctly file electronically

Some related topics:

• Form 1095-B and Form 1095-C
• Why am I no longer eligible for financial help?
• Premium tax credits and filing