Here are some useful links where you can find an info on taxation in your country and download tax forms and documents to use in your business.
Employee’s Withholding Allowance Certificate
Request for Taxpayer Identification Number and Certification
Estimated Tax for Individuals
Change of Address (For Business)
Transition Accounting Copy Right 2019 - Reg no: 00246009 - IPA -
ABN 81 059 081 443