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Let's say you want to buy a house - you go in, show the bank all your income from working, prove you're a good risk...but if
your job is running a sexy sexy blog, the fact that you're doing the bookkeeping is key. Although the blog post is about buying a house, it all comes down to the drudgery of being a self-employed writer and all the boring parts thereof. Sure, you make a living orgasming for profit, but you still gotta save those receipts or else you can't deduct your Astroglide when tax time comes.
Via.