Investors & landlords

I have not taken any depreciation on my single family residential rental property. Last year we hired a CPA. He was supposed to catch up the years from 2005-2023.  He amended 2021/22 for 2 years depreciation and took a single year depreciation for 2023. Won't be going to him again. This year I will take the yearly depreciation.  I read that I need form 3115 to take the 15 years of depreciation. Unless I sell this property, this could be a moot point.  But I'd rather be in compliance. 

I need to now catch up the years 2005-2020 (15 years). Can this be done?