Intimation u/s 143(1)

I have received intimation u/s143(1) due to difference in the TDS for AY 2017-18. There is a difference in the actual tax deducted and TDS showing in 26AS.

After consulting in our office the problem rectified and TDS in 26AS has been updated. I have to get refund for excess tax deducted.

Now i want to know whether the excess tax is credited to my bank automatically or i have to claim for refund specially.

If i have to claim for refund please inform me the procedure.

Adv thanks.