You don't "loan" money to a single member LLC that you own. It's just a contribution of capital. Basically, taking money out of your left pocket (the personal pocket) and putting it in your right pocket (the business pocket). You already paid tax on that money before you put it in your left pocket. If you then transfer it to your right pocket and record it as income, you'll be taxed on it "again". Certainly, you don't want that.
It just gets reported on the business books as a capital infusion. It gets reported nowhere on your tax return.
