Calculation and Editing Tricks in QuickBooks 2012

QuickBooks 2012 makes calculating numbers simple. Place the selection cursor in an amount field and then use the following symbol keys to make quick calculations.

Key	Result
+	Adds the number you just typed to the next number you type
–	Subtracts the next number you type from the number you just typed
*	Multiplies the number you just typed by the next number you type
/	Divides the number you just typed by the next number you type

If the selection cursor is on a date field, you can use these tricks to edit the date:

Key	Result
+	Adds one day to the date shown
T	Replaces the date shown with today’s date
–	Subtracts one day from the date shown
]	Moves the date shown one week forward
[	Moves the date shown one week back
‘	Moves the date shown one month forward
;	Moves the date shown one month back
Y	Changes the date to the first day in the year
R	Changes the date to the last day in the year
M	Changes the date to the first day in the month
H	Changes the date to the last day in the month

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Source:http://www.dummies.com/how-to/content/calculation-and-editing-tricks-in-quickbooks-2012.html