I filed for unemployment the day my boss said we were being furloughed, but he "rehired" almost immediately and I tried to cancel but could not get through. My checks came and I did not cash them. I was waiting for them to ask for them back and I got a bill for them this month. I will be sending them back voided. Do I still file like I received unemployment?
Yes, you still collected unemployment. The correct procedure would be to cash the checks and then pay them back when unemployment marked them as an overpayment,
Their computer system will not know how to handle getting back voided checks and you may be a long time trying to get things straightened out. At some point, you may have to engage a lawyer to try to straighten out the confusion that this is going to cause.
In the past, when these things were done by humans, you method would have worked.
I would call the state unemployment office
That's probably the best move. But since history shows that communication is seriously lacking in many government agencies, the very first question you should ask is, "To whom am I speaking please?". Then make sure you document everything, to include the date/time of your phone call.
When you end up having to call back multiple times in what may (or may not) be a fruitless effort to fix things, chances are slim to none that you will ever speak to the same person twice.