if an estate k-1 shows income in box five, should I have received a check? That's all I have is the k-1 showing income in box 5. The trustee who is also the accountant is unavailable
That is an issue you will have to take up with the trustee of the estate. If you believe the K-1 is incorrect you must get it corrected... otherwise you must report the income on your return.
You are really asking if this should have been distributed to you. Please see a local estate attorney.