Regarding tax payable notice

sir assessment year 17/18 k liye service tax notice ayi huwi hai kiyn K o Year me income tax me 56 lakh receipts hai mager service Tax return me koi turn over Nahi dikhaya gaya tha kya ab koi scheme hai jisse tax reduce hosakta hai ager hai tu please batayiye is 56 lakh me 30 lakh receipts exempted hai