No, this is not a huge error. If you are no longer a dependent in 2020 after having been a dependent in 2019, then the Recovery Rebate Credit is for you.
To get to the section to report 0 in each stimulus payment box, go to the search and enter stimulus. Click the Jump to link.
To verify your eligibility, see: How do I claim the Recovery Rebate Credit?
To determine if you are considered a dependent in the eyes of the IRS, see: Who can I claim as my dependent?
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