Can i claim a parent or other adult that lives with me as a dependent?

Yes, the Credit for Other Dependents. The maximum credit amount is $500 for each dependent who meets certain conditions. These, include:

• Dependents who are age 17 or older.
• Dependents who have individual taxpayer identification numbers.
• Dependent parents or other qualifying relatives supported by the taxpayer.
• Dependents living with the taxpayer who aren't related to the taxpayer.

You can claim this credit if:

• You claim the person as a dependent on your return.
• You cannot use the dependent to claim the Child Tax Credit or Additional Child Tax Credit.
• The dependent is a U.S. citizen, national or resident alien.