Retirement tax questions

I read an article today via fastercapital.com/content/Retirement-Accounts, which was totally opposite of what you're previously saying --

"Investments in individual Retirement accounts (IRAs) can be a great way to save for retirement. However, understanding the rules and regulations surrounding these accounts can be confusing. One aspect that can be particularly tricky is Schedule K-1 reporting. This is a tax form that reports the income, deductions, and credits of a partnership or limited liability company (LLC). When an IRA invests in a partnership or LLC, the IRA owner will receive a Schedule K-1 that they must report on their tax return. "

 

Do I misunderstand something here? Thank you