app/views/series_statement_merges/_form.html.erb
<%= simple_form_for(@series_statement_merge) do |f| %>
<%= f.error_messages %>
<div class="inputs">
<%= f.input :series_statement_id %>
<%= f.input :series_statement_list_id %>
</div>
<div class="actions">
<%= f.button :submit %>
</div>
<% end %>