Carpentry business owners: how do you track tool depreciation for retirement savings?

I've been running my custom cabinet shop for 15 years now and just started digging into retirement planning seriously. Saw a thread on r/woodworking about QuickBooks for bookkeeping but I'm still using spreadsheets for tracking stuff like my Festool Domino and SawStop table saw depreciation. Anyone using a solid CPA or software that makes deducting those big-ticket items easier without screwing up your 401k contributions? Feels like half my profit vanishes into tools every year.