Can anyone figure out if this is edible or deadly?

Where are you located? Also, were there any purple/pink flowers on this, or did you see any white ones?

EDIT: There are two plants in this photo it looks like, with two distinct leaf structures. Which one are you asking about?

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Does it smell like chervil?

There are some really poisonous plants in that family, so I wouldn’t risk it unless this is growing where you planted chervil seeds.

Smell it