Why APPLY TDS is ticked by default in purchase order/invoice items

Consider i dont have and i dont use any taxes, I go to purchase order/invoice and enter the supplier then enter the items, when i click on any item to see the details i note that there is a checkbox called “APPLY TDS” which is by default checked. so my questions are

  1. does it make any difference if i tick it or not?
  2. if it makes any difference i dont want it and where can i disable it, because i want to completely hide it and avoid its impact.

@NCP your support is highly appreciated

hope somebody help :slight_smile: