Should my 401K contributions show up on line 32?

[VolvoGirl]

Line 32 of what?  Is this for a prior year?  401K contributions should not show up on your return at all.  Schedule 1 line 32 is only for IRA.  You do not enter 401K under Deductions & Credits as a contribution.  Only enter 401K from your W2, nowhere else.  It is a pretax item and has already been deducted from the wages in box 1 so you can't deduct them again.

[Rainman12]

Line 32 of What? They're in Box 12 of your W-2 (Code D), usually don't show up anywhere else in your return ...

[dmertz]

No.  A 401(k) is not an IRA.