Easiest way to get copies of old schedule Cs for proof of income?

[cluelessoregonguy]

The "important drawer" swallowed my schedule Cs somehow. I've never paid much attention to them as I've been paying in cash for like a decade until recently. Now I need them if I want a way into a credit union like DCU. I'll collect 1 this December and 1 next December and hopefully buy my first house around that time but I'm currently interested in DCU's Visa and possibly a car loan.

Will form 4506 get me schedule Cs also? Do I literally have to shell out $50 for each year or is it $50 for the entire request? None of my taxes are ever returns. I always owe. Not sure if that makes a difference. Last time I got on the phone to the IRS I spent nearly 4 hours on hold in 3 different calls. I really hate dealing with this stuff lol

[Revelate]

A tax transcript is typically free; DCU might want the 4506 but I'm not certain of any fees associated with that but I haven't been self-employed in a while to have to do tax returns to verify income.  

I would imagine anything you report as taxable (and then some possibly) would be there.