The 1099-R forms I received for my 401(k) and 403(b) accounts both do NOT have the "IRA/Simple/SEP" box checked -- presumably because they are not "IRA" accounts. Nevertheless, should I check the "IRA/Simple/SEP" box in Turbotax, in order to get the distribution amounts to show on line 4a (which says "IRA distributions" on the 1040)? I.e., are 401(k) and 403(b) plans counted as "IRA" plans for the purposes of lines 4 and 5?
