This error occurs when the total current‑year capital gains at Item 18 on the Individual return does not match the total calculated in the Capital Gains Worksheet / CGT Schedule. The mismatch is usually caused by manual overwriting of fields at item 18.
Log in to HandiTax and Select the tax return.
Highlight the Main form I and click Edit.
Go to item 18 label G, 'Did you have a capital gains tax event during the year?', ensure this is set to Y.
Check that item 18 labels M, H, V, and X have not been manually entered. These fields must remain system‑controlled so that values flow automatically from the CGT schedule. If any of these labels contain manual entries, remove the overwritten values.
Allow the CGT schedule data to populate item 18.
Click Errors to check the return for errors.