Military tax question (2020) – صحيفة الصوت

So I've completed my 4-months recruit school in 2019 and had no service to do in 2020 due to the pandemic (I still have the letters saying that both the refresher course and mandatory shooting obligation were suspended for 2020).

In 2021, I was declared inapt and exempted from further service due to health issues (not bad enough to be exempt from the tax) and now in 2022 I have received both exemption tax for the fiscal year 2020 and 2021.

I understand getting taxed for 2021 but in 2020, when I was still in the army, they informed me that I didn't have to complete any of my service duty so can I contest this 2020 tax or is it totally normal?

Thanks!