Come end of January, I get antsy waiting for HR to send out the W2 forms. I usually have the return already filled out by that point, only needing my official salary numbers; I just do some quick back of the napkin math for that until the W2 comes. By the time all the tax forms come in, all I need to do is plug in the numbers, give it a final check to make sure I didn’t miss anything, and then it’s sent off. Haven’t had an issue doing it this way in years.