I am in the process of conversion and I've been told by my Rabbi that I can't wear a Tallit nor a Tallit Katan until I am officially Jewish.
His reasoning is that it's a Mitzvah and not relevant until I'm a Jewish.
For me, I want to keep as many mitzvot as I can in my everyday life and how can I live a Jewish life if I can't observe all mitzvot or at least aspire to observe as many as I can.
I should say that it's a liberal Rabbi in the UK ( there aren't many options on congregations and conversion where I live) and having visited other synagogues and been given a Tallit to wear by different Rabbis, I have to question what I'm being taught.
Many thanks for taking time to answer.