Tax transcripts from the IRS showing income are far better than tax returns to show proof of income.
IRS tax transcript are better proof of income because by just providing your tax return does not actually prove that you’ve filed with the IRS or that you paid any taxes. Anyone can fill out a Federal Tax Return in just a few minutes and sign it and make copies. IRS transcripts are from the IRS, Internal Revenue Service, and they show documented income that’s been filed with the IRS.
If you provide your tax returns instead of transcripts, you’ll also have to provide your W2s, or 1099s with the transcripts you will not need to provide them.
Tax transcripts are free, and you can order them online through the IRS website. It usually takes about 15 days to obtain your transcripts. When you order the transcripts it is best if you order for the last 3 years as you will need that information later in the Immigration process.