Can I claim my parents as dependents even though they filed taxes? They are both retired, my mom is 66 years old and my dad is 81 years old. Please clarify. Thank you.

[betty_1990]

I do live with them year round.

[KenH1]

It is possible, if they both selected "someone else can claim me as a dependent on their return," which releases their dependency exemption.  Otherwise your e-filed return will get rejected. 

Here are the 7 test for claiming a dependent:

1) You provided more than half of their financial support. More info

2) They made less than $4,050 in gross income during 2016 unless they are a qualifying child    (under 19 OR a full time student under 24 OR permanently disabled)

3) They live with you or they are related to you.

4) They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.

5) They aren't (or won't be) claimed as a dependent by someone else.

6) They aren’t filing a joint return with their spouse.

7) You are not being claimed as a dependent on someone else's return.