hey, how can I proof that the tax bill is fake?

I've found this e-tax guide from inland revenue authority of singapore (https://www.iras.gov.sg/irashome/uploadedFiles/IRASHome/e-Tax_Guides/etaxguide_CIT_Income%20Tax%20Treatment%20of%20Digital%20Tokens.pdf), is there something in there that invalidates it?

we, victim of scammers, should just cross our arms and watch them cheat another people?