The former Leeds captain is also keen not to let the occasion be a distraction as he looks to keep up Norwich's recent impressive away record.
The Canaries currently occupy an automatic promotion spot, in second place on 79 points ahead of Watford by a goal difference of +1.
Three points are essential, while Leeds are looking to bounce back from a third straight loss.
Howson said: "It will be nice to go back but it's not a case of me going to enjoy it. I've got to go there and be professional for the team.
"Their fans will be right behind them, and I know the atmosphere you can get at Elland Road. If we're going to come away with three points then we've got to be right at it."
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Howson started the season on the sidelines through an injury sustained at the end of 2013/14, but has become a must-pick player for the club, excelling particularly under new boss Alex Neil.
His seven goals make him the club's fourth top scorer this season, behind Lewis Grabban, another ex-Leeds man in Bradley Johnson, and Cameron Jerome who has 18 goals.
Howson is a former academy star who would fit perfectly at Leeds right now, if only they had a chance of getting him.
With more than 200 appearances to his name for the club, he can look forward to an excellent reception on Tuesday night, even if the fact he was sold for just £2 million still rankles with supporters.