The documents you need to provide when applying for a residential mortgage generally vary depending on the loan. Working directly with a mortgage company beforehand allows you to learn how to apply for a home loan so the process goes smoothly. Developing a loan checklist ensures you have all of the information you need before meeting with a lender and can also help you get prequalified for a home loan. When it comes to documentation, it is important to have up to two years’ worth of records.