How to amend a specific tax (family member's) return?

I use Turbo Tax Deluxe to prepare individual returns for my family members (there are multiple tax return files for Turbo Tax Deluxe 2021 - 2022).   I need to amend one of theirs which was already e-filed and processed (after 8 weeks!), not mine. 

 

When I log into my online account per the Help Instructs on "How do I amend my 2021 return" (https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-..."

the system says that "I" haven't filed yet (which is true for "me").

 

How can I amend a specific tax file/return ?