I want to develop a simple tool to compare monthly green house gas emissions from scenario 1 (on-going project) with BAU (Business as usual) practice. I want users to enter data in scenario 1 in every month . BAU data is content. Once the user enter a set of new data in scenario 1 (D7:D13) and if they click "save data" button, it should be saved in the table below under the corresponding month. Then the cells for data entry should be cleared for user to enter data again in next month (example is attached herewith) . Does anyone know how to write VB code for this? Thanks and look forward to hear opinions from the experts.