Creating Form On One Spreadsheet Then Pushing The Data To Another?

I am a personal loans officer and have created a worksheet to input a range of information about an application. The information is personal details and details about the loan. The data I input runs down Column D [with line breaks to seperate the answers into categories] with the question beside it in Column C.

I do this for every new application as I use it for reporting on my loans as well as mail merge to produce documents for the loan.

Currently I am doing one per loan but would like to have a button at the bottom of the page that once clicked, it will push the data onto another worksheet so that all my loans for that month are on the one spreadsheet. The data will be pushed onto a row, not a column, but it will also need to find the next available row to put the data on.

Once the button is clicked, the first worksheet will clear ready for the next loan to input and the data will transfer to the 2nd spreadsheet. And, if possible, on the first sheet will be a drop down list of all the current loans so I can recall any application details to the first sheet if needed to update details. So if the 'loan number inputed' already exists, it wont create a new line on the 2nd spreadsheet, but will know just to update the fields.