Hello, I had a large Forex loss in 2016 amounting to almost -$50k. Do I put the full amount of my loss, or only the $3,000 which I can deduct?

TD Ameritrade does not provide 1099 forms for Forex trading, so the only thing I have is a printout of my Forex trading statement. 

I have read conflicting information from others in the Intuit community, but some have said I am supposed to put my losses under:

Less common income - Misc income 1099-A 1099-C - Other reportable income

From what I understand, I am only allowed to deduct $3,000 every year until I no longer have a net loss. However, what amount am I supposed to put in Turbotax? Do I write the full amount of my loss, or do I only write -$3,000, and then report -$3,000 again on my next years taxes, etc?

Thanks in advance for any help from the community.