Can you estimate how much I will get back for 2023 if I worked three jobs one of them I made 1200 for 3 months the other one I made $1,400 and last one 15600

No one in this user forum can estimate your refund with that information.  We do not know your filing status, whether you have dependent children, how much tax you had withheld, what credits and deductions (if any) you might be entering.....etc.etc. etc.

Try the TaxCaster tool:

https://turbotax.intuit.com/tax-tools/calculators/taxcaster/

If you were a W-2 employee for all of those jobs, make sure you wait for all of your W-2's to enter on your 2023 return.  They all have to go on the same tax return.    If you were paid in cash or receive a 1099NEC for any of those jobs, it is a different story.   If any of those jobs were work for which you were paid as an independent contractor, you will owe self-employment tax for Social Security and Medicare.   

A suggestion:

Use this IRS site for other ways to file for free. There are 8 free software versions available from the IRS Free File site

https://apps.irs.gov/app/freeFile/

@Jackjake23 use this website to estimate it:

https://www.dinkytown.net/java/1040-tax-calculator.html