Macro to copy formula to end of data based in another sheet

Hi,
so I'm new to macros but I've been searching lots of sites but cannot find the answer to my question.

I am trying to get a formula to copy down a column in one sheet but only as far as there is data in another sheet in the same workbook. I'd be using VBA (I think) and I've found macros to get it to copy a formula down to the bottom of data within the same sheet but I cannot work out how to get it to run from another sheet. Below may have also been messed up in my failed attempt :/

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That Is the code I've managed to find and the values for columns, cells and sheets are correct for where it needs to come from. The problem I am having is that I get a "Compile error. Expected: end of data" on the range line.

Hope someone can help, everything I know about macros is self taught very recently. Even a better code that actually works would be welcomed with open arms

Thanks
Waz

No It will be running on a sheet named "DUPLICATE CHECK" but will be taking values from the sheet named "CARD" from column D if column a matches the criteria of "cd" (its a reference code for us).

I tried the following and got a runtime error 13 type mismatch and when i ran the debug It showed the red line as the problem. Being new to this I am not sure how to fix it.

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Any help at all is appreciated

Thanks a bunch it works perfectly I may not fully understand it but it's definitely helped me a lot!

Waz

@ Wazations

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Thanks.

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