"1. I got a K-1 last year, but it was for an inherited IRA, which is taxable, but not until it was cashed out. I did pay the tax when I cashed it out. "
This makes no sense.
If you were the beneficiary of the IRA, you become the owner of an inherited IRA, it would be titled something like "John Smith Jr. as successor to John Smith". You would get a 1099-R, but only when you withdrew funds. An inherited IRA (beneficiary IRA) would never be included on a K-1.
Or, if the IRA had no beneficiary listed, it would become part of the estate. If the estate withdraws the funds and distributes the funds to the heirs, the heirs will get a K-1. You would get a K-1 for any year that a withdrawal is made, and be responsible for the tax.
I can't tell from your description what is going on, you may want to have an accountant review your documents and your situation in detail to see if the executor is handling the affairs correctly.
