How should I enter my < $600 earnings as poll worker (no W2)

 Since it's a one-time payment,  you can enter it as "Other Income" .  Follow the navigation instructions in the TurboTax Help article Where do I enter a 1099-MISC?

1. When you get to the screen that asks you Does one of these common situations apply? Select None of these apply
2. Select  No that it didn’t involve work like your main job
3. Select how often you received the bonus
4. Select No it didn’t involve the intent to earn money.

Your income will appear on line 8 of Schedule 1 of your 1040 as Other Income.