I need to find the information on my W2's for every year going back to 2016. I've had various jobs throughout that time period and some of those companies are out of business.
Well---for one thing----you are too late to receive income tax refunds for any tax years earlier than 2021---even if you would have received a refund for those years, you have forfeited the refunds now. The IRS will not pay them. But if you owe tax due, the IRS still wants to be paid with late filing penalties and the interest that has been adding up since the filing deadlines for the returns.
W-2's come from employers.
There is not a federal or national website that provides W-2’s.
t. Some employers have payroll sites that will have your W-2. You might need to phone, drop in, email and/or snail mail an old employer to make sure they know where to send your W-2.
https://ttlc.intuit.com/questions/2561916-how-can-i-get-a-copy-of-my-w-2
You can get a wage and income transcript from the IRS: It will not show the actual W-2, 1099’s, etc, but will show the income information the IRS received. It will not, however, show your state information. It will only show the federal information.
https://www.irs.gov/individuals/get-transcript
Pay Social Security $126 per W-2:
https://faq.ssa.gov/en-US/Topic/article/KA-02501
What if I do not file my tax return?
https://ttlc.intuit.com/questions/2572308-what-happens-if-i-don-t-file-my-taxes