as to changing dependency status, the question to answer on your return is not whether you were claimed as a dependent but whether you could be claimed as a dependent.
so here are the rules
you could be claimed as a qualifying child if all these tests are met
• you have the same principal abode as the other party for more than ½ the tax year. Temporary absences like for school are ignored
• If not a full-time student, under 19 at the end of the tax year. If a full-time student under 24 at end of tax year.
• you haven't provided over ½ your own support
• you didn't file a joint return unless there was no tax liability but merely filing joint to facilitate refund of taxes withheld or estimates paid
or as you could be a qualifying relative if all these test are met
> your related or if not lived with the other party for the entire year
• your gross income for 2019 less than $4,200
• the other party provided over ½ his support
• he isn't a qualifying child of another taxpayer
