Hello all sifus, I'm currently in the midst of learning how to do business with my family. And to be frank my family business is quite a mess especially when come to filing and taxation stuff. There's a lot of questions about income tax for me as I'm totally confused right now.

Scenario
COMPANY A (partnership enterprise) 50/50
Profit 50,000 in a year
Salary payout
- toll reimbursement 600 (November & December only)
- petrol reimbursement 600 (November & December only)
- food allowance 300 (November & December only)
- basic 1500 (September to December)

COMPANY B (Employee)
- salary 2,500 (EPF 325+275) (1year)
- reimbursement 600 (1year)

COMPANY C (sdn Bhd) 49% shares
- Loss of 10,000
Salary payout
- toll reimbursement 600 (September to December)
- petrol reimbursement 600 (September to December)
- food allowance 300 (September to December)
- basic 1500 (September to December)

How do I calculate? Company sdn Bhd declare income tax and I personally need to declare as well?