@Maud4 Lines 23400 and 23600 should be the same if you have no amount on line 23500. All 3 lines are linked to calculate your NET income.
Line 23400 is your NET income before adjustments
Line 23500 is the social benefits repayment
Line 23600 is your NET income (line 23400 minus 23500)
Here a link about line 23600
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