I was hoping to get all of my taxes going back to my very first, but once I hit 1995, I started having other people do my taxes for me (which meant no more 1040 forms).
As for post processing....
Some sharpening, resizing, rotation, and balance, along with cloning out some pencil marks.
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Wow. You still have all those? I can't even find last years! Unfortunately, your image contains no tacks. Taxes and pins, but no tacks. ;) Focus and POV right on. Color perfectly balanced. 8 for correct usage of a tack. or 8 tacks.
The different shades of white of the state tax forms are distracting. Petition your state government to use the same color white as the IRS does for the federal forms.