How do I check if my account is earning interest?

Interest is on the "Cash" portion of Solo 401k pretax, Solo 401k Roth accounts, both Traditional and Roth IRA accounts and taxable brokerage accounts. 

You can tell if your cash is earning interest by going to app.carry.com -> click on the account (e.g., Traditional IRA) -> click on Investments at the top -> click on Cash on the left; you should see a "Earning X.XX% APY" badge on the top right if it's earning interest.