I realize I could just divide by four and use $500, but that is not the correct way to do it. However it may be the only way. If dividing by four was correct, why wouldn't Turbotax do this automatically or the IRS instructions say to do this. The tax on Net Investment Income does not come into play until your income reaches a certain threshold level which in my case didn't happen until sometime in the fourth time period. The lack of instructions amazes me and line 16 doesn't make any sense.
