tax withholding

 

I have 2 jobs; one withholds taxes. I am self employed for the second, and earn about $20,000 per year.  How should I pay my estimated taxes?  I'm wondering if I can have more withheld from my "regular" job as the most efficient way to do that.  

 

I haven't paid any estimated tax for 2023 yet, so how should I do that for this year, and how can I best be proactive and get it set up for next year?

Thanks.