CA tax credit help

Hello All, (also posted in general form) I'm sure this has probably been covered but I'm a little confused about the tax filing. I adopted my daughter last year and I'm looking into the tax credit. Since we adopted from foster care there really wasn't any expense besides court fees which were already reimbursed. So, can I still claim a tax credit? I also see that we can claim the entire amount if our child is "special needs". What type of document would then need? I read this must be an official state determination. My daughter did receive some speech therapy but wasn't determined special needs for the Federal Subsidy we receive monthy. I'm in CA if it helps. Thank you