If you are not licensed, you cannot legally give investment advice. Series 6, 66, 63, and 7 licensures (or some combination of those).
However, as Judy says, the tax benefits (or detriments) of IRAs or other investments is something we can - and should discuss. Start out with "not investment advice; tax consequences only) and reiterate that at the end, too. Along with "talk to your investment advisor." Also remind the client that any tax advice from the investment advisor is suspect.
I do wish we could get the licenses of investment "advisors" who give tax advice yoinked the way ours can be for investment advice. I've heard - heck, we've all heard - preposterous and expensive and generally horrible "advice" our clients blithely followed from their "stock guy" that blew up in their faces come tax time. And far too often, we've been hit with the blame and/or the anger.