A search for Thomas Scott arriving on the Vanguard in the index to Immigration 1848 - 1912 (https://www.qld.gov.au/recreation/arts/heritage/archives/search-the-records) held at Queensland State Archives has revealed no results.
As his birth was registered in Victoria, then his arrival may also be registered in that state. Therefore you will need to search for his arrival into Victoria. I suggest you consult the website for the Public Record Office Victoria (https://prov.vic.gov.au/) for further information on immigration into Victoria.
A search for Thomas Scott arriving on the Vanguard in the index to Immigration 1848 - 1912 (https://www.qld.gov.au/recreation/arts/heritage/archives/search-the-records) held at Queensland State Archives has revealed no results.
As his birth was registered in Victoria, then his arrival may also be registered in that state. Therefore you will need to search for his arrival into Victoria. I suggest you consult the website for the Public Record Office Victoria (https://prov.vic.gov.au/) for further information on immigration into Victoria.