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Your son has reached the age of majority. While it sounds like you have bent over backwards to help him out, he is legally an adult. I assume when you say "legal pressure" you are referring to removing him from your residence. If you give him a deadline to leave the residence, and he does not comply, you will most likely be faced with needing to evict him legally. There are legal requirements that must be met in an eviction and a real estate attorney in your area can help with this.