Troubleshooting

Hello, 

I need clarification on this point.

I am filing in 2024, so filing taxes for the 2023 year.

The line in question is asking for information from my spouse's 2023 tax return (line 23400, 23500, etc).

Are we not currently filling out this tax return? How can I have this information if it isn't filed yet? Is it looking for last year's return? I appreciate the clarification.