Adding $ to a Trad IRA, refund doesn't increase. Why? IE. Entering between $1500 and $5250 increases refund by $342. Should $1500 go Trad IRA and $3750 into a Roth IRA?

Income of $80,000 from inherited 401k, $5259 income from wages, $13000 from earnings into a 401k. Program is generating form 8606 which hasn't happened in prior years. Is the $80000 too much as usually only 60-65000 is taken out of the inherited 401k.