I don't know. DOE has a similar application called the FAFSA which collects and verifies tax income information quite swiftly before notifying schools with a Student Aid Report (SAR) to determine income-based financial aid eligibility. So whatever application they are building for this Loan Forgiveness program is probably built on top of that. Never was under the impression that you could give false income numbers on your FAFSA because they can't verify it and walk away with financial aid you aren't eligible for, though it is true in that case that the schools are ultimately responsible for verifying information and making the decisions.
Concern is the people at DOE who now have to implement the President's directive probably don't want to consider amended returns, otherwise the forgiveness program could get really nasty if somebody amends 2 years later and becomes eligible and has made loan payments after the freeze ended.
P.S. Situation was the same for us in 2020, with the 2020 tax returns are currently filed separately. I could amend the 2020 return instead to be MFJ, but obviously it is no longer an option for superceding the 2020 return.
