Retirement tax questions

Thank you much, however, I feel like I'm not explaining myself correctly...my only income is from SS and an IRA. I have a separate brokerage account that has nothing to do with my retirement accounts. The question is either 1) Can I deduct the brokerage account loss from my adjusted income which is comprised of social security and IRA income. OR  2) Is the brokerage account a whole separate matter? if so, how and where would I be able to deduct those losses if I cannot deduct them from my SS and IRA income? Hope that makes sense.   Thanks again.    PS. I understand that I cannot deduct IRA losses.