Investors & landlords

When you enter the 1099-B, the basis gets entered into the Cost box (1e).   Instructions are in the link.  The cost basis on your 1099-B may be $0.  Or, you may have received a $0 value from your import.   Enter the amount that is on your form.   Since you’re unsure of your cost basis or know that it’s incorrect, check the box The cost basis is incorrect or missing on my 1099-B.   

Since you clicked that box, you will get a screen to enter your correct basis.

Cost basis refers to the cost or other basis of an investment.   In most cases it's simply the total amount you paid for the investment items you sold.   It's important because it determines how much of a taxable gain -- or a loss -- you claim on your tax return. If you don't report a cost basis, you'll be taxed on the entire sale price, and you don't want that.

Usually the cost basis is reported on your Form 1099-B.   But if not, then click here for some tips that could help it.