For example, if a single taxpayer was incorrectly marked as "can be claimed as a dependent" in 2019, and did not get any of the economic impact payments, the number shows up on the line should be 1,800 assuming her income is below 75,000 in 2020? Currently it the software shows 1,200, and I understand the forms and software are not finalized but I just want to set the expectation correctly.

Suppose that her income is more than 99,000 in 2020, does it mean that she cannot recover on 2020 form 1040? Is there another way to recover, or she will permanently lose the payment? The IRS says it cannot do anything else but to recover in 2020.