[Magma7404]

If it "requires" input, it's something you need to do by definition. Use a todo list or kanban (Obsidian has this) or in a calendar.

In a professional context, tell your boss that you can't and won't work without the required information. Or improvise with fake/mock data.

[helloworlddd]

Good point it being something you need to do. I will just add it to my todo list. If you can't progress with your work until you have the input, is there a good way of chasing it up when dealing with someone unreliable but senior?