
Calculate tax on total income:
Total Tax - 58,90,965
Surcharge @ 25 % on total tax - 14,72,741
(A) = Total Tax with Surcharge- 73,63,706

Now calculate tax on upto 2 Cr.:
Tax on income upto 2cr. (B) :- 5812500
Surcharge on tax up to 2cr @15% (C) :- 871875
Balance remaining income (20261550-20000000) (D) :- 261550
(E) = Above is the total of 3 calculations (B+C+D) :- 6945925
Marginal relief (A-E) :- 7363706-6945925 = 417781.
Net Surcharge - 1472741 (Surcharge on Total Income) - 417781 (Marginal Relief) = 1054960
Hope this Helps.