Form CG1 – Capital Gains Tax Return - What did I do wrong?

done4now

Registered User
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In 2023 I made a profit of €900 on selling shares so I filled out the CG1 form to reflect that. To my surprise I got a letter stating I owe €300 and my payment is already overdue.
After finally getting through to the helpline (closes at 13:30) the agent I was speaking to just told me to fill in the form again but when I stated I didn't know what I did wrong on the form. He looked through my form and then just contacted that department. A week later I got a letter stating I now correctly owe €0 but I still don't understand what I did wrong on the form.

So I was hoping someone could point out what I did wrong my GG1 form.

My total value of sales I made was €1782
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My actual profit from this was €919
1707500721444.png

I used €919 of the Personal Exemption
1707500809689.png

I left section 21 and 22 blank as they would have been 0
1707500906218.png


So was my mistake in leaving section 21 and 22 blank?
 
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