Have your ever experienced your financial aid being updated?

[thumper1]

The financial office said the adjustment is because of the 2019 tax returns. They probably had access to tax returns after 4/15

Nope. The college cannot just access your tax returns. The way they access is if you link to to the IRS Data Retrieval Tool, but for the 2020-2021 academic year, that access would be for the 2018 tax return…not the 2019 one.