Also, those under presumptive taxation (Section 44AD) must pay in full by March 15 ... For making an advance tax payment, Challan No. ITNS 280 must be duly filled in, which requires PAN details, ...

Except for some senior citizens, advance tax must be paid by all assessees, including NRIs, if the tax payable is ₹10,000 or more. Read on to avoid paying fines in the form of interest.