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Don't try to create the formular by yourself!
You will have to follow formal procedures to work out numbers by using official formulars and schedules. If you don't want to dig into it, ask for a professional service then...

You will have to follow formal procedures to work out numbers by using official formulars and schedules. If you don't want to dig into it, ask for a professional service then...
Try to be clarified between self-employment and incorporation(only me, no other employee).
For income tax, no matter is gain or loss, does it simply account as: income - expenses --> taxable income?
Please help me out.