Section 465(d) carryover refers to a loss that was limited in a prior year due to the "at risk" rules. At risk is a test that the IRS uses to see if you can deduct losses from investments and businesses that you own.
The basic rule is that you can't deduct a loss from your investment or business if the loss doesn't actually cause you to lose money.
Money you've invested in your business that is not at risk includes:
If you think you may have reported that you are not at risk in error, this is how to change it:
If you are using TurboTax Desktop, installed on your computer, you can look at Schedule C in Forms mode, by clicking on the Forms icon in the upper right corner. Look at line 32b of Schedule C to see if this box is checked.