Qualifying for a mortgage involves lenders reviewing your finances, including income, debts, and assets. Key documents include tax returns, W-2s, and credit reports. To improve your chances, maintain a good credit score, lower your debt-to-income (DTI) ratio, and save for a larger down payment. Avoid job changes during the application process and consider a co-borrower if needed. Obtaining a mortgage pre-approval is recommended to understand your budget and strengthen your offers when house hunting.