There is a form on the irs website that you can fill out if you are poor and can not afford to pay taxes etc. .

1. File Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. You can file by mail, online with an IRS e-filing partner or through a tax professional.
2. Estimate how much tax you owe for the year on the extension form: Subtract the taxes you already paid for the filing year.

Also, if you owe, you can do a payment plan based on what you make:

https://www.irs.gov/payments/online-payment-agreement-application

You can also temporarily delay the collection process while you seek other options:

https://www.irs.gov/businesses/small-businesses-self-employed/temporarily-delay-the-collection-process

Or

Offer in Compromise:

Offer in Compromise (OIC)

An Offer in Compromise (OIC) is an agreement between the taxpayer and the government that settles a tax liability for payment of less than the full amount owed. If you received a letter notifying you that your offer was rejected, you have 30 days from the date on the letter to request an appeal of the decision.

For more information, refer to:

Appealing Your Rejected Offer in Compromise (OIC) Form 656-B, Offer in Compromise