How can I calculate professional tax by formula or condition?

Hi @CodeOne,

Please apply it and check.
for example.

1800 if (B / total_working_days) * payment_days > 15000 else 900 if 12000 < (B / total_working_days) * payment_days < 15000 else 500 if 9000 < (B / total_working_days) * payment_days < 12000 else 0

Reference:

Please set your condition according to you.

Thank You!