Add ability for TDS & TCS

[Tut]

@Xcode

TCS which is collected by the supplier - is introduced so that the small vendors who are usually very good at evading tax by not disclosing their actual income would be accountable and some tax would be received from them

That may be its goal. But the fact remains: such a tax is entirely unrelated to income and unjustifiable on a financial basis. It seems a rather clumsy attempt to enforce compliance with income tax laws.