Flipped a house, now what do I do with all my receipts??

[Glenn English]

I am about to close on my first flip. Yay! I am a newbie at this, and have recorded all of my expenses in a spreadsheet and I have receipts, bills, invoices, etc in a pile and now I'm wondering what the heck to do with all this paperwork?? I realize I need to get organized for tax purposes, but where do I start? maybe this is more of a question for my accountant, but just wanted to see what others have done as I'm sure there's a better systems than mine (which essentially is putting the transaction in a spreadsheet and then throwing the receipt in a pile).

please help!

-Glenn