Column f is not the same as box F, and adjustment code E is not the same as box E. Adjustment code E means that you paid sales expenses that are not taken into account in the 1099-S. After you enter the details of the sale in TurboTax you will get a screen that says "Let us know if any of these situations apply to this sale." On that screen, check the box that says "I paid sales expenses that aren't included in the sale proceeds reported on the form." Then enter the additional sales expenses. TurboTax will show the expenses as an adjustment on Form 8949, with adjustment code E in column f.