I believe it depends on the line item you are adjusting. If the particular line item being modified to FIFO was retained earnings, you would use the (1–TR) because those lines items take place after taxes. If the line items are before tax (i.e., Inventory) then you would use w/o the tax rate. Adjusting income statement items follow the same logic as well, except instead of using the current LIFO reserve, you have to take the change in the LIFO reserve.
Edited for some clarification