I can never wrap my head around that.
From an account, I received 294.18 CHF interest.
The actual interest was 452.59, but the rest was the Verrechnungssteuer.
From how it’s worded, I would put the 452.59 in the first box (because that was the original amount before the tax was paid/withheld). But I’m never sure if that is right or if I should put the 294.18 in the 2nd box…