Dear aspirant

As per the IAS age limit eligibility criteria, those between 21 to 32 years as on August 1, 2023, can fill the UPSC IAS application form.

So you should be minimum of 21yrs to appear for UPSC exam. So by August 1,2023 you will be of 21 yrs old.

So yes you can appear for UPSC exam in 2023 if you meet other eligible criteria.

You can check the eligibility criteria from the link below

https://www.google.com/amp/s/competition.careers360.com/articles/upsc-ias-eligibility-criteria/amp

Hope this information helps you

Best wishes