For three possible reasons: the first is when we have to order your tax transcripts from the IRS. They will reject the request form if there is any discrepancy at all between your tax returns and your transcript request to include the home address on your tax returns. If it’s wrong on your return, it will need to be wrong on the transcript request so it matches what the IRS has. The second reason is because you would  be surprised at how many times people leave out self-employment income or various places of employment from their employment  history. This gives me another opportunity to make sure your income is correct, otherwise the IRS transcripts will show it and we’ll get conditioned for it. And the third reason is if you are doing a USDA loan. Tax transcripts are required and we need to see the tax returns first.