T4A(P) could contain two types of benefit: Retirement and Disability. Both benefit have its own number of months in different boxes on the slip. The following group of two boxes must both have a value at the same time.
- box 14 and 23, for retirement benefit
- box 16 and 21, for disability benefit
Please check if you mismatch the boxes mentioned above, or missed entering one box.Tags: month, pension, T4A(P), t4ap