Here is a very simple trick to print your 941 after you have closed the year: All you need to do is change your system date to the prior year.
Let's say, for example, that it is January 15, 2013 and you want to print your 2012 941. Click the Microsoft Dynamics GP logo in the upper left corner of your screen. Select User Date. Change the User Date to 12/31/2012.
Now your 941 will produce the proper results.