You need to claim it as self-employment income if you were paid for your seminar presentations. According to Michigan, you should file a Michigan tax return if you file a federal tax return.
For Michigan : File a return if you owe tax, are due a refund, or your AGI
exceeds your exemption allowance. You should also file a
Michigan return if you file a federal return, even if you do
not owe Michigan tax. This will eliminate unnecessary
correspondence from Treasury.
