If my partner is the main application, but I am a Carpenter and Joiner, should I complete the Australian skills assessment?

With a passport from the UK, Ireland, Canada, USA or New Zealand you automatically add 5 points to your partner’s Australian visa application. If you completed the Carpenter and Joiner skills assessment for Australia (and are under 45 years of age) this would add 10 points. 

You would also benefit from the Certificate III in Carpentry and Joinery which will benefit when applying for a job as a Carpenter and Joiner in Australia.