Suneet Singla Ji,
Pl. go through carefully what I want to say.
What I understand you are printing books, brochures, leaflets, booklets, pamhlets, calendar, greeting cards, magazines, computer sheets etc. This type of printing amounts to manufacture and fall under Chapter 49 of Central Excise Tariff Act, 1985. These are excisable goods and Calendars, greeting or wedding cards are not exempted from CE duty. However, threshold exemption limit of ₹ 1.50 crore is available under SSI exemption. If I have assumed correctly, you are exempted from Service Tax as your activity is covered under Section 66 D (f) of the Finance Act which is extracted below:-
"SECTION 66 D[(f) services by way of carrying out any process amounting to manufacture or production of goods excluding alcoholic liquor for human consumption;]"
So better option for you is to resort to Section 66 D (f) (NEGATIVE LIST) rather than looking towards Mega Exemption Serial No.30 (a) of Notification No.25/12-ST as amended.
Do not think about Serial No.30(a) of Notification No.25/12-ST