Hope you are asking how to copy value of one cell into an another cell , if yes then you can use formula in excel.
ex: you have given value in cell A1 i.e. 12 and you need value 12 in Cell B1 as well then go to the cell B1 text box and write formula i.e. =A1 and click enter . It will copy value from cell A1 into Cell B1 , in case you need for entire column then just drag it down will copy value from column A to B for entire row.
In case I have not answered to your question exactly then please brief your question again in detail.