Electrical job work income

I am filing ITR for first time.

Actually I have major income from selling electrical appliances plus some income from servicing electrical appliances(job work).

Please guide me how shall I show income from servicing electric appliance.

Can it be shown as income from other source.(in that case what should I fill in  "Sch TDS2").

If not can it be shown under presumptive income under 44AD.For example income from selling electric appliances is 275000 and income from servicing electric appliance is 120000.

Please let me know how I show income 1.2 lakhs in my itr 4.