Hi there,

One can register for CA foundation exam after passing class 10th examination. But he/she can appear in exam only after appearing in 10+2 standard.

So you can not give exam of CA foundation in December. However, you can register for it.

Students preparing to appear in December exam must register themselves before 1 July and if they are going to appear in may/June exam they should register before 1st January.

Hope it helps you.

Good luck!