I am sorry for your loss.
The items you sold from your father's estate (that you inherited) are capital assets and the holding period is long-term as the items were acquired from a decedent. You can report the sales on Form 8949 and Schedule D which translates to entering the sales in the same manner as having sold a stock, bond or mutual fund in TurboTax.
As a result, any gain/loss would be long-term capital gain/loss. However, since these were personal items, only a gain will be recognized; a loss cannot be deducted.
Further, the basis for the items would be stepped up to their fair market value on the date of death. As items held for personal use (and probably mostly personal effects), there should be little or no gain and most likely a loss on the sales. Regardless, you need some way to show the basis of the items (i.e., the fair market value on the date of death).
If the items were sold shortly after death, then the sales price was probably equal to the fair market value on the date of death so the transactions were all a wash (i.e., no gain or loss).
