If you invest in your 401(k) plan the maximum you're allowed, you can deposita tad more in 2004. The limit on 401(k) contributions goes up $1000from 2003 levels to $13,000. If you are turning age 50 during the year, catch-upcontributions raise the maximum to $16,000. As the advertising clichÃ© goes,however, certain restrictions apply, including contribution limits for "highlycompensated" employees who make more than $90,000 a year. Contributionmaximums for those covered by simplified employee pension (SEP) plans, IRAs,simple IRAs, and solo 401(k) plans are also going up. Check with your tax professionalfor details.