1. You owe additional tax and situations (2), (3), and (4), below, do not apply to you: Keep records for three years. 2. You do not report income that you should report, and it is more than 25% of the gross income shown on your return: Keep records for six years. 3. You file a fraudulent return: Keep records indefinitely. 4.
Twin Mattress. A twin mattress is the smallest possible mattress size, other than a crib-sized mattress. Twin mattress dimensions are approximately 38 inches wide by 75 inches long. Both twin and full sizes are approximately 75 inches long, which may be too short for some adults, especially men.
Twin sized mattresses are typically 38 to 39 inches in width. For headboard design, it's typical to add at least 6 inches to the width, making it 44 or 45 inches; the extra 3 inches on each side gives the mattress a bit of wiggle room to move. Headboard height is subjective, but typical height is about 24 inches above the top of the mattress. If your mattress is of typical height, the overall height of the headboard from the floor to the top should be at least 36 inches. Add another 6 to 12 inches to the height if desired for aesthetics.