Like the poster earlier, speak with your tax professional.
The new U.S. tax code amends IRC Section 1031 (a)(1) regarding “like kind exchanges,” excluding all cryptocurrencies from a previous legal loophole and making all cryptocurrency trades a taxable event.
http://bitcoinist.com/cryptocurrency-investors-lose-tax-break/
Since March 2014, the IRS has treated Bitcoin and other digital currencies as property for
tax purposes. This makes them subject to capital gains tax, requiring taxes be paid whenever crypto is exchanged for fiat currency (ie. cash).
Coins held for less than a year are subject to regular income tax, which can range anywhere from 10 to 37 percent, depending upon personal income levels. Coins held for longer than one year are subject to long-term capital gains tax, which caps at around 24 percent.
However, it has never been clear whether a trade between two
different cryptocurrencies qualifies as a “like kind exchange.” Up until this point, cryptocurrency trades have typically resided in this legal gray area, granting most traders a loophole for deferring taxes on short-term capital gains.
However, the new amendment definitively narrows the 1031 exemption to only cover real estate swaps, excluding Bitcoin entirely. It specifically limits the scope of the law from previously covering “property” to now only covering “real property.” And as a digital asset, cryptocurrency is about as far from “real property” as one can get.
The end result is that, starting next year, effectively all cryptocurrency trades will be taxed at the time of their execution, bringing an end to one of the most lucrative tax loopholes previously available to traders.
New Tax Law Closes Bitcoin Loophole
http://fortune.com/2017/12/21/bitcoin-tax/
The tax act in Sec. 13303
amends IRC Section 1031 (a)(1) to delete “property” and replace it with “real property” …
So, you can see that now I can no longer take the position that my Bitcoin to Litecoin exchange was a like kind one under Sec. 1031, and I have to recognize the gain when I do it.