Tds on professional tax u/s 194j

I don't know if I will be availing the services of same professional again in current FY.

Currently the bill for his professional service is Rs. 29,000/-

If I avail his service again in this Financial year, and the bill comes to Rs 2,000/-, it takes the total value to Rs 31,000 which is above the specified limit.

How should I deduct the TDS?

Should it be 10% on Rs 2,000/- or 10% on (29,000+2,000)?

In the second case TDS amount will be more than bill amount itself !

Please guide.