Deductions & credits

I donated $800 worth of kids clothes. I do not have receipts for when I purchased them but I used the salvation army guidelines to make a spreadsheet with the items and their suspected value. I averaged in between the high and low options. I also took pictures of the items donated. The donation receipt has the address and contact information for the establishment. I am wondering if they are going to require more than I have since I don't remember when I acquired every piece of clothing I donated or how much I originally paid for it. Are they going to need this much information? I am planning on using TurboTax this year and would like to claim the full $800.