Regarding your income from savings, it is already deducted when your profit was realized, when you file return, you'll not be taxed on your profit again.
There will be no tax on any income where you have already paid tax, for instance many employer submit tax of their employees, so your salary income will not be taxed when you file return.
But you'll need firm or lawyer to do your filling becoz common people don't know what to fill in detail for instance when you mention your salary income, it should be gross salary.
That's why go for lawyer or firm to avoid hassle of objection by FBR.