Can I claim our 22 yr old as a dependent,living @ home & going to college?She made $11K in '18, & owed $950 in SS tax.We owe $3700 in fed. taxes on $64K in total income.

Seems we can't declare her as a dependent, & even though we paid $3800 in tuition, looks like federally we can't claim that expense. Trying to reduce my tax liability.  Am I missing something?