Fix DC TANF child care deduction formula

[hua7450]

Fixes #6099

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.15%. Comparing base (4e29deb) to head (3231cba).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6101   +/-   ##
=======================================
  Coverage   99.15%   99.15%           
=======================================
  Files        2928     2928           
  Lines       42106    42106           
  Branches      197      197           
=======================================
  Hits        41750    41750           
  Misses        321      321           
  Partials       35       35           

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