Based on my research, here is my analysis of the claim:

Reasoning:

• According to Wikipedia, Vinícius Júnior has scored a total of 8 goals for the Brazilian National Team across all official competitions¹
• Transfermarkt data confirms this, showing exactly 8 goals in 47 appearances for Brazil's senior national team, broken down as: 2 goals in International Friendlies, 3 goals in World Cup Qualification, 2 goals in Copa América, and 1 goal in the World Cup²³
• The year-by-year breakdown from Wikipedia shows his goal tally progression: 0 goals in 2019 and 2021, 2 goals in 2022, 1 goal in 2023, 2 goals in 2024, and 3 goals in 2025¹
• All sources consistently confirm that Vinicius Jr has scored exactly 8 official goals for Brazil's senior national team

Overall validity: 100%

1. Vinícius Júnior - Wikipedia
2. Vinicius Junior - National team - Transfermarkt
3. Vinicius Junior - National team - Transfermarkt