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For clarification: 

I don't have to file a tax return 

My spouse can file Married but filing separately 

My parents can still claim me as a dependent. 

 

My questions are: 

1. In my spouse's tax return, he would be needing my SSN for spouse info, so if my parents also enter my SSN in as a dependent, would that flag anything? 

2. Is there an option in my spouse's tax return on TurboTax where he can check off a box stating that someone else can claim me? ex: my parents. 
If so, when he reviews the tax return papers before filing it, where would that checked box be shown?