<<If you were not eligible to be claimed as a dependent in 2019 and you checked the box by mistake, it did not affect any other part of your tax return except your eligibility for the stimulus payment. At this time, it is simply too late to file an amended return and it would be a waste of time. You should receive the payment when you file your 2020 return.>>
just following on to this part of the comment. If this is what occurred, be sure to fill out the TT questions correctly on the 2020 tax return and you should see the stimulus payment show up as a credit on Line 30 of the Form 1040.
