Are these all OK?
I have two years to retirement.
I have two years before retirement.
I have two years left until my retirement.
I have two years before I retire.
I'm two years away from retirement.
Two years have been left to my retirement.

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The first sentence can also be:  I have two years to retire (retire-verb)

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I agree with Neil, the last one is not accurate but the rest are fine :) Good job!

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The last one is strange, but the others are correct. Add me as a friend and if you need any help just give me a message.