I think you only need to open one Trust for 4 beneficiaries. It is so much simpler: you only have to file 1 Trust tax return/ year, and issue 4 K-1 for 4 beneficiaries if the Trust have earn income and distribute to beneficiaries. If you have 4 Trusts with 4 EIN it means you will have to file 4 trust Tax returns, it is costly. My advice is you can file the final Trust return to close them, and open just 1 Trust for 4 beneficiaries.
