GST Code and section 44AD applicability for DTP Job Work business

Hi All,

I am running a business of DTP job work from foreign clients and getting payments in USD. I want to know whether my business is eligible for section 44AD presumptive taxation. My revenue is under 20 Lakhs. Kindly clarify,

1. My business is eligible for section 44AD?

2. My business is Goods or Service under GST? Whether the exemption limit is 20 Lakhs or 40 Lakhs?

I will be greatly appreciate if anybody clarify my queries.

Thank You

Regards

Muthu