Update guidance text (#2631)

app/views/bulk_upload_shared/guidance.html.erb

@@ -81,8 +81,8 @@
       <%= accordion.with_section(heading_text: "Next steps") do %>
         <p class="govuk-body">Once you've saved your CSV file, you can upload it via a button at the top of the lettings and sales logs pages.</p>
         <p class="govuk-body">When your file is done processing, you will receive an email explaining your next steps. If all your data is valid, your logs will be created. If some data is invalid, you’ll receive an email with instructions about how to resolve the errors.</p>
-        <p class="govuk-body">If your file has errors on fields 1 through 17, you must fix these in the CSV. This is because we need to know these answers to validate the rest of the data. Any errors in these fields will be featured in the error report’s summary tab.</p>
-        <p class="govuk-body">If none of your errors are in fields 1 through 17, you can choose how to fix the errors. You can either fix them in the CSV and reupload, or create partially complete logs and answer the remaining questions on the CORE site. Any errors that affect a significant number of logs will be featured in the error report’s summary tab to help you decide.</p>
+        <p class="govuk-body">If your file has errors on fields 1 through 15 for lettings, or 1 through 18 for sales, you must fix these in the CSV. This is because we need to know these answers to validate the rest of the data. Any errors in these fields will be featured in the error report’s summary tab.</p>
+        <p class="govuk-body">If none of your errors are in fields 1 through 15 for lettings, or 1 through 18 for sales, you can choose how to fix the errors. You can either fix them in the CSV and reupload, or create partially complete logs and answer the remaining questions on the CORE site. Any errors that affect a significant number of logs will be featured in the error report’s summary tab to help you decide.</p>
         <p class="govuk-body"></p>
       <% end %>