How do I add a validation check between two reports?

Short Answer: Click '+ Add validation check', enter a 'Check name', choose Report 1 + Column and Report 2 + Column, then click 'Save check'.

PreRequisites

1. At least two reports added to the reconciliation

2. Be on the Copy reconciliation page

Steps

1. On the Copy reconciliation page click '+ Add validation check' near the side where you want to add the check.
   The 'Add validation check' modal opens.

2. In the modal type a descriptive name into 'Check name' placeholder shows examples.
   A Check name is entered.

3. Under 'Report 1' select the first report from 'Select report' and choose its 'Column'.
   Report 1 and Column are selected.

4. Under 'Report 2' select the second report from 'Select report' and choose its 'Column'.
   Report 2 and Column are selected.

5. Click 'Save check' to save the validation.
   Validation check is saved and appears on the main page example: 'T1' tag near a side.

Troubleshooting

1. 'Save check' does nothing or appears disabled.
   LikelyCause: Required fields Check name, Report or Column are empty.
   Action: Enter a Check name and select both Report + Column pairs, then click 'Save check'.

2. Desired report not listed in 'Select report'.
   LikelyCause: That report hasn't been added to the reconciliation.
   Action: Add the report to the appropriate side first, then re-open the 'Add validation check' modal.

Note: The 'Add validation check' modal shows a 'matches with' divider between the two report blocks. Saved checks appear on the main page near sides.