It doesn't matter where it comes from, it matters how it is earned and how you report it. YOU ABSOLUTELY DO NOT NEED T4 INCOME.

The Benefit is available to workers:

Residing in Canada, who are at least 15 years old;

Who have stopped working because of reasons related to COVID-19 or are eligible for Employment Insurance regular or sickness benefits or have exhausted their Employment Insurance regular benefits or Employment Insurance fishing benefits between December 29, 2019 and October 3, 2020;

Who had employment and/or self-employment income of at least $5,000 in 2019 or in the 12 months prior to the date of their application; and,
Who have not quit their job voluntarily.

Self employment income is not reported on a T4. Better advise your friends...

Counts as income:

All employment or self-employment income, including:
    tips
    non-eligible dividends
    honoraria (nominal amounts paid to volunteers)
    royalties (payments to artists)

Does not count as income:

disability benefits
student loans, bursaries or scholarships
pension income
amounts from other COVID-19 benefits:
    Canada Emergency Response Benefit (CERB)
    Canada Emergency Student Benefit (CESB)
    Canada Recovery Benefit (CRB)
    Canada Recovery Caregiving Benefit (CRCB)
    Canada Recovery Sickness Benef

Straight from the website, dude. You tell me.

It doesn't matter where it comes from, it matters how it is earned and how you report it. YOU ABSOLUTELY DO NOT NEED T4 INCOME.

The Benefit is available to workers:

Residing in Canada, who are at least 15 years old;

Who have stopped working because of reasons related to COVID-19 or are eligible for Employment Insurance regular or sickness benefits or have exhausted their Employment Insurance regular benefits or Employment Insurance fishing benefits between December 29, 2019 and October 3, 2020;

Who had employment and/or self-employment income of at least $5,000 in 2019 or in the 12 months prior to the date of their application; and,
Who have not quit their job voluntarily.

Self employment income is not reported on a T4. Better advise your friends...