As per the attachment. Your income tax refund is Rs, 868/- and ye, TDS deducted out of it is Rs. 270/-.
For TAN no. of deductor, you will have to get it from TDS certificate issued by ITD, or form 26AS available on TRACES.
TAN of ITD of each state is different. e.g. that for Gujarat state it is AHMI00800C.
So, you can contact helpline for TAN no.; specific to you.