Some things you are saying do not make sense. Parents do not get a stimulus payment of $500 for any child older than 16. So were you younger than 17 at the end of 2018? Even if you were, in 2019 you are still young enough to be a qualified child dependent for your parents and you cannot get a stimulus check yourself. Your parents can claim you as a dependent until you are 19, or even until you turn 24 if you are a full time student.
If you were older than 16, the only "dependent payment" your parents could get for claiming you is a credit on their tax return called the credit for other dependents--for $500 to lower their tax due.
CREDIT FOR OTHER DEPENDENTS
https://ttlc.intuit.com/questions/4499708-what-is-the-500-credit-for-other-dependents-family-tax-cre...
Review the rules for whether you can be claimed as a qualifying child or qualifying relative on your parents' return.
WHO CAN I CLAIM AS A DEPENDENT?
You can claim a child, relative, friend, fiance (etc.) as a dependent on your 2019 taxes as long as they meet the following requirements:
Qualifying child
• They are related to you.
• They cannot be claimed as a dependent by someone else.
• They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
• They are not filing a joint return with their spouse.
• They are under the age of 19 (or 24 for full-time students).
- No age limit for permanently and totally disabled children
• They live with you for more than half the year (exceptions apply).
Qualifying relative
• They don't have to be related to you (despite the name).
• They cannot be claimed as a dependent by someone else.
• They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
• They are not filing a joint return with their spouse.
• They lived with you the entire year.
• They made less than $4200 (not counting Social Security)
• You provided more than half of their financial support. More info
When you add someone as a dependent, we'll ask a series of questions to make sure you can claim them.
Related Information:
• Does a dependent have to live with me?
• What does "financially support another person" mean?
• Can I claim a newborn baby?
The rule is if you CAN be claimed as a dependent then you must say so on your own tax return. Dependents are not eligible for stimulus checks.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**