Turbotax does not currently have an assistant to help you determine the value of your items. However, you can enter the value yourself if you know it. You do not need to list every individual item that you donated.
You are required to have your own accurate records that includes a list of items (inventory) with sufficient detail to be able to determine the value-- at a minimum, a short description and the condition (good or fair, you can't claim a deduction for items in poor condition unless you have a signed appraisal.)
Then, you can enter group donations and assign a group value. For example, if you donated a group of used clothing items with a combined value of $100 on June 6, you can enter that as a single donation. You don't need to list each item of clothing. You can get the values yourself by checking the prices in local thrift stores, or for higher quality items, maybe look at Thredup or consignment stores.
