Hi Amitava da (amitava123gems),
By TSR, I am assuming you mean eBay Top Rated seller. Top rated seller is a way to recognise sellers who have a reasonable quantity of sales and have high customer satisfaction which reflects in their DSR scores.
To qualify for Top Rated seller, you need to be a PowerSeller on India.
AND
You need to have 100 transactions and $3000 GMV in past 12 months.
AND
Low DSRs (1s and 2s) on no more than 0.50% of all transactions with U.S. buyers on each of their 4 DSRs.
Click Here for more details
On your My eBay > Seller Dashboard > Check your low DSR
In this section, it will quickly tell you if you qalify for top rated seller and on which couts you are not meeting.
Regards,
Sapana