"Do I have to pay Income tax on money left to me by my aunt from a trust when she passed away in 2016?"
The only way to get a definitive answer to your question would be to contact the fiduciary (the trustee) of the trust or anyone who would otherwise be responsible for filing an income tax return for the trust.
Generally, an inheritance is not taxable to the recipient (some states do have an inheritance tax), and you should receive a Schedule K-1 (form 1041) if the trust generated any income or gain that is taxable to you.