Fyst 462 implement some form d-400 ctc lines for both pdf and xml

app/lib/efile/nc/d400_calculator.rb

@@ -4,6 +4,7 @@ class D400Calculator < ::Efile::TaxCalculator
       attr_reader :lines
 
       def calculate
+        set_line(:NCD400_LINE_10B, :calculate_line_10b)
         set_line(:NCD400_LINE_20A, :calculate_line_20a)
         set_line(:NCD400_LINE_20B, :calculate_line_20b)
         set_line(:NCD400_LINE_23, :calculate_line_23)
@@ -16,6 +17,22 @@ def refund_or_owed_amount
 
       private
 
+      def calculate_line_10b
+        income_ranges = if filing_status_single? || filing_status_mfs?
+                          [0..20_000, 20_001..30_000, 30_001..40_000, 40_001..50_000, 50_001..60_000, 60_001..70_000, 70_001..Float::INFINITY]
+                        elsif filing_status_hoh?
+                          [0..30_000, 30_001..45_000, 45_001..60_000, 60_001..75_000, 75_001..90_000, 90_001..105_000, 105_001..Float::INFINITY]
+                        elsif filing_status_mfj? || filing_status_qw?
+                          [0..40_000, 40_001..60_000, 60_001..80_000, 80_001..100_000, 100_001..120_000, 120_001..140_000, 140_001..Float::INFINITY]
+                        end
+        income_range_index = income_ranges.find_index { |range| range.include?(@direct_file_data.fed_agi) }
+
+        deduction_amounts = [3000, 2500, 2000, 1500, 1000, 500, 0]
+        amount_per_child = deduction_amounts[income_range_index]
+
+        amount_per_child * @direct_file_data.qualifying_children_under_age_ssn_count.to_i
+      end
+
       def calculate_line_20a
         @direct_file_data.w2s.reduce(0) do |sum, w2|
           if w2.EmployeeSSN == @direct_file_data.primary_ssn

app/lib/pdf_filler/nc_d400_pdf.rb

@@ -55,7 +55,8 @@ def hash_for_pdf
         y_d400wf_li20b_pg2_good: @xml_document.at('IncTaxWithSpouse')&.text,
         y_d400wf_li23_pg2_good: @xml_document.at('NCTaxPaid')&.text,
         y_d400wf_li25_pg2_good: @xml_document.at('RemainingPayment')&.text,
-        y_d400wf_li10a_good: @xml_document.at('NumChildrenAllowed')&.text
+        y_d400wf_li10a_good: @xml_document.at('NumChildrenAllowed')&.text,
+        y_d400wf_li10b_good: @xml_document.at('ChildDeduction')&.text
       }
     end
 

app/lib/submission_builder/ty2024/states/nc/documents/d400.rb

@@ -43,6 +43,7 @@ def document
                 xml.FAGIPlusAdditions @submission.data_source.direct_file_data.fed_agi
                 # line 9 DeductionsFromFAGI is blank
                 xml.NumChildrenAllowed @submission.data_source.direct_file_data.qualifying_children_under_age_ssn_count
+                xml.ChildDeduction calculated_fields.fetch(:NCD400_LINE_10B)
                 xml.NCStandardDeduction standard_deduction
                 # line 16 TaxCredits is blank
                 xml.IncTaxWith calculated_fields.fetch(:NCD400_LINE_20A)

spec/lib/efile/nc/d400_calculator_spec.rb

@@ -9,6 +9,55 @@
     )
   end
 
+  describe "Line 10b: Child Deduction" do
+    [
+      [["single", "married_filing_separately"], [
+        [20_000, 6000],
+        [30_000, 5000],
+        [40_000, 4000],
+        [50_000, 3000],
+        [60_000, 2000],
+        [70_000, 1000],
+        [70_001, 0],
+      ]],
+      [["head_of_household"], [
+        [30_000, 6000],
+        [45_000, 5000],
+        [60_000, 4000],
+        [75_000, 3000],
+        [90_000, 2000],
+        [105_000, 1000],
+        [105_001, 0]
+      ]],
+      [["married_filing_jointly", "qualifying_widow"], [
+        [40_000, 6000],
+        [60_000, 5000],
+        [80_000, 4000],
+        [100_000, 3000],
+        [120_000, 2000],
+        [140_000, 1000],
+        [140_001, 0]
+      ]]
+    ].each do |filing_statuses, agis_to_deductions|
+      filing_statuses.each do |filing_status|
+        context "#{filing_status}" do
+          let(:intake) { create(:state_file_nc_intake, filing_status: filing_status, raw_direct_file_data: StateFile::XmlReturnSampleService.new.read("nc_shiloh_hoh")) }
+          let(:calculator_instance) { described_class.new(year: MultiTenantService.statefile.current_tax_year, intake: intake) }
+
+          agis_to_deductions.each do |fagi, deduction_amount|
+            it "returns the value corresponding to #{fagi} FAGI multiplied by number of QCs" do
+              intake.direct_file_data.fed_agi = fagi
+              intake.direct_file_data.qualifying_children_under_age_ssn_count = 2
+
+              calculator_instance.calculate
+              expect(calculator_instance.lines[:NCD400_LINE_10B].value).to eq(deduction_amount)
+            end
+          end
+        end
+      end
+    end
+  end
+
   describe "Line 20a: North Carolina Income Tax Withheld" do
     let(:intake) { create(:state_file_nc_intake, :df_data_2_w2s) }
 

spec/lib/pdf_filler/nc_d400_pdf_spec.rb

@@ -56,12 +56,15 @@
 
         context "CTC fields" do
           let(:intake) { create(:state_file_nc_intake, filing_status: "single", raw_direct_file_data: StateFile::XmlReturnSampleService.new.read("nc_shiloh_hoh")) }
+          let(:child_deduction) { 2000 }
           before do
             intake.direct_file_data.qualifying_children_under_age_ssn_count = 5
+            allow_any_instance_of(Efile::Nc::D400Calculator).to receive(:calculate_line_10b).and_return child_deduction
           end
 
           it "sets the correct values" do
-            expect(pdf_fields['y_d400wf_li10a_good']).to eq '5'
+            expect(pdf_fields["y_d400wf_li10a_good"]).to eq "5"
+            expect(pdf_fields["y_d400wf_li10b_good"]).to eq child_deduction.to_s
           end
         end
       end

spec/lib/submission_builder/ty2024/states/nc/documents/d400_spec.rb

@@ -41,13 +41,16 @@
 
       context "CTC-related values" do
         let(:intake) { create(:state_file_nc_intake, filing_status: "head_of_household", raw_direct_file_data: StateFile::XmlReturnSampleService.new.read("nc_shiloh_hoh")) }
+        let(:child_deduction) { 2000 }
 
         before do
           intake.direct_file_data.qualifying_children_under_age_ssn_count = 3
+          allow_any_instance_of(Efile::Nc::D400Calculator).to receive(:calculate_line_10b).and_return child_deduction
         end
 
         it "pulls from DF" do
           expect(xml.document.at('NumChildrenAllowed').text).to eq "3"
+          expect(xml.document.at('ChildDeduction').text).to eq child_deduction.to_s
         end
       end
     end