Hello,
Line 23200 can come from multiple places. Most common places that it will come from are:
1. T4A Box 201 - Repayment of Covid19 Financial assistance
2. T4E Box 30 - Repayment of social benefits
3. T4RIF Box 22
4. T4RSP Box 28
This not an exhaustive list as there are additional areas.
Please let me know if you have any more questions 😄