When to Gross Up Return Calculations for Taxes

I am frustrated and confused on when to gross up for taxes and when to calculate net for return calculations. The sample exams have an example of one of each? There doesn’t seem to be any consistency of when to net out taxes or use gross. Thanks.

Vector: Do a search on this - there is a HUGE thread on this - we went back and forth on it several days ago. D_M EDIT: Here it is… http://www.analystforum.com/phorums/read.php?13,723060,723130#msg-723130

Thanks