Check with CA, its based on trust. Ultimately, if you sit and re-do all individual contract notes, you'll end up with tax pnl itself. so why re-do tedious work ?
Share the contract notes for supporting docs but no need to re-do.
Things sometime get blown out of proportion with CA's not doing proper work. Truth is how FnO TO is computed has no effect on actual PnL. Its negligence based on Traders trying to twist the laws to avoid audit.
Tax is computed based on PnL and not TO. If you're in all circumstances doing Audit, TO can go out of window.
And the lethargy of declaring flat 8% profit, manipulating TO etc
wala chakkar is an intentional collusion of Client and CA to cut corners. Both are at fault.