On the actual 1040 Lines 1 through 10a all have quickzoom buttons to go to the entry point, that 10b should also, or at least have a right click/cross reference option, or were going to see this question asked alot.

@Orlando  how hard would it be to add something to line 10b of the 1040 (either a QZ button or a right-click Cross Reference option)?

Got the feeling lots of people are going to be in here asking how to enter that $300 on that line.