Also, for what period of time is proof of income required? If it's just for the period from January 1, 2024, on, then pay stubs -- perhaps supplemented with a letter from your employer confirming your employment and rate of pay -- might be sufficient. But if it's for income earned in 2023, then I expect that you would need to provide a copy of your 2023 W-2 form which your employer should have provided to you in January of this year.