@jcalvarez All Releve 1 with a box O should have a code to identify the source of income.
We invite you to consult this link from Revenu Quebec about the Releve 1 box O and, if you don't have any code, you should contact the issuer of this releve or Revenu Quebec.
RL-1 Slip – Box O
To Contact Revenu Quebec, click here.
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