well i didnt pay last year and RBI didnt knew about it.
1. Read the policies.
2. Depends on what's your category. Like mine is software consulting
3. Depends on amount
4. Depends on RBI too.
Now, if you have managed exempted tax from RBI, it doesn't means RBI doesn't knows it. It's just that RBI is busy with more amount of frauds.
And one thing, you don't pay tax like paying bill, it's automatically deducted.
1. Source of income (e.g. company) automatically deducts your tax.
2. If not, banks have that information and banks does that for you
So if you are into tax level, it'll be by default deducted by any means.
Again, remember, paypal is not only dependent on amount, but also the category you have set.