Lookup / Indirect function to lookup information from various tabs/worksheets

First post, please help if possible.

In the attached file, I need a formula in B2 that can:-
1: Find a tab/worksheet that is the same name as A2.
2: On that tab/worksheet, find the heading that is the same as B1
3: Return the value that is in row 12 of that tab
4: Copy the formula for the above columns and rows.

I have left only 2 tabs in to make the file smaller. Happy to provide further information if rquired.


Thanks,
Raj