How strict is Thai income tax department?

[Thaidude]

Those who pay tax there, how strict is the IT department there? In the US its pretty strict as they can easily penalize you if you dont pay tax on time

[blackcab]

A penalty of 100% of the tax owed for an inaccurate return and 200% of the tax owed for failure to file a return.

Plus 1.5% interest on money owed due to late payment.