Hi,
There are two options to offer the income from Royalty- One offer under the head Income from Profession (Section 28)- Other alternative being to offer under the head income from Other Sources (IFOS). The frequency and intensity of the activities leading to generation of the income determine what head to offer.
Since you have been filing the return in form ITR-2 I believe you are treating the income as IFOS. Expenses incurred (other than capital expenses) wholly exclusively for earning the income is allowed for dedcution u/s 57 in case this option is chosen. Accordingly following expenses are allowed to be claimed-
a. Interest on car loan- 57(iii)
b. Depreciation on car -57 (ii)
c. Car maintenance- 57(iii)
But the onus of proving that such expenses are essential and are incurred wholly and exclusively for earning the income is on the assessee.
Additionally, you may refer to Section 80QQB through which your tax burden may come down substantially, however, subject to certain conditions and limitations.
Hope the above was useful.
Regards,
CA Hariprasad Nayak