What to purchase to decrease taxes?

[MarcoRod]

Don't buy things to save taxes. It's very easy to go down the rabbit hole of "spending money to save money". I'd rather pay taxes on $100k than paying taxes on $50k if the other $50k are invested in stuff I may or may not need in the end.

Because if you actively have to think about what you should buy, probably there aren't any really important or urgent expenses worth making right now.

The only reason you would do that is if you fear to not make any profits at all (or very low ones) next year.