Mo. Rev. Stat. § 135.329

No credit shall be allowable for that portion of the nonrecurring adoption expenses for which a credit is allowable and taken under any similar provision of federal, state, or local law. Credit may be taken up to the amount allowable under section 135.327 for that portion of the nonrecurring adoption expenses which exceed the credit taken under such other provision of federal, state or local law. If there is a deduction allowable and taken under any other provision of federal, state or local law which is similar to the credit allowable under section 135.327, the credit allowable for nonrecurring adoption expenses shall be reduced by the amount of the decrease in the tax liability resulting from taking such deduction. No credit shall be allowable for that portion of the nonrecurring adoption expenses paid from any funds received under any federal, state, or local program.