let me amend what I stated
Since you are not dependent on your parents for support, go ahead and amend your tax return NOW. When you do so, the 1040X should be smart enough to realize that you are eligible for the stimulus. What you parents income is has no bearing on your eligibility.
I think there is a comment section and I'd write in that you inadvertently checked the CAN BE claimed box and you are not a dependent, so you want to amend and want to be sure that you receive the $1800 in stimulus payments you are due,
Note that the ONLY way to get the 1st two stimulus payments is through the 2020 tax return, so you need to amend to obtain it.
for the 3rd stimulus, if you don't receive it, you can get it on Line 30 when you file next year(2021 tax return). Short of receiving the payment from the IRS, that is going to be the ONLY way of obtaining it.
Separately, suggest just waiting on the IRS to fix the unemployment issue. They have asked that folks not amend as they have the information required to fix the unemployment stuff with out people amending.
