Question #1: If my college student  wants to claim himself as a dependent when he files his return can I  still claim his as a dependent on my return?
 
No. If you want to claim your son as  a dependent and take an exemption for him on your return then he cannot  claim a personal exemption for himself on his IRS tax return. Instead,  he will need to check the box on his return indicating that someone  else claimed him as a dependent.
Question #2:  What should I do if I realize I made a mistake on my tax return that  I have already e-filed?
