When someone has Master Limited Partnership (MLP) unrelated business taxable income (UBTI) income that is less than < $1000 in his/her Roth IRA for a particular year, it is known that he or she does not need to pay any taxes.
Questions:
1. In this case, does he/she still need to file the tax (for solely record purpose)?
2. If he/she later sells the MLP stocks and realizes some capital gains (not dividends), does these capital gains contribute to the annual $1000 UBTI limit?
Thanks!