"Have not been able to find instructions from IRS under the Cares Act for either one"

You are seeking info on CARES Act Disaster Retirement Distribution provision. It's not income averaging; it relates to Disaster provisions, which is why 8915-E applies.

The IRS has forms and instructions.

Here's the ProSeries Help Article: https://proconnect.intuit.com/community/retirement-tax-credits-and-deductions/help/generating-form-8...